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--- /dev/null
+++ b/COPYING
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+
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
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diff --git a/README.md b/README.md
new file mode 100644
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,71 @@
+# SGM:  The STLWRT-ian GTK Modules
+## GTK Modules of all kinds, for a classic GTK+ 2-esque user interface
+
+SGM is a collection of useful modules for GTK, mostly to restore a more
+classic user interface and experience to GTK+ 3 and above.  Currently,
+this repository only contains the code for the "sgm-flexible-mnemonics"
+module, but more are planned to follow.  Similarly, this module is known
+not to work with GTK 4 yet, but support for GTK 4 should come eventually
+too, as long as the community doesn't drag their feet in adopting GTK 4
+but that's a different story).
+
+### sgm-flexible-mnemonics
+
+*Mnemonics* are the underlined portions of text which indicate which key to
+press to activate a particular widget, be it a menu item or a button.
+Prior to GTK+ 3.9.8, a setting called `gtk-auto-mnemonics` could be modified
+to either always display these underlines, or display these underlines only
+when the "modifier key" (typically Alt on many keyboards) was pressed.  In
+GTK+ 3.9.8, the latter mode is always used no matter the setting of
+`gtk-auto-mnemonics`.  This module restores the classic mnemonic behavior to
+GTK+ 3.9.8 and later versions of GTK.
+
+### sgm-overlay-scrolling **(COMING SOON)**
+
+Traditionally, scrollbars have appeared to the side of scrolled content.
+In GTK+ 3.15.0, a new means of displaying scrollbars was introduced:
+*overlay scrolling*.  When overlay scrolling is enabled, scrollbars do not
+initially appear; instead they wait for mouse movement before appearing,
+and even then appear *on top* of scrolled content instead of *to the side*
+of said content.  This is good for users with little screen space, and it
+would be tolerable to other users if there were an easy way to disable it;
+however, until GTK+ 3.24.9 there was only an environment variable to
+disable overlay scrolling globally.  An environment variable is tolerable,
+but it needs to be set every time a GTK application is run, or else overlay
+scrolling will be enabled again.  In GTK+ 3.24.9, a new setting was
+introduced to disable overlay scrolling globally, `gtk-overlay-scrolling`.
+But this setting left users of older versions of GTK in the lurch; even
+today, some users continue to use GTK versions as old as 3.18 because that
+is the latest version shipped by their distributor for an old Long Term
+Support release of their distribution.  This module adds the
+`gtk-overlay-scrolling` setting to GTK versions prior to 3.24.9, so that
+conservative themes can universally set the `gtk-overlay-scrolling`
+property to `false` to disable overlay scrolling -- even on GTK versions
+prior to 3.24.9.
+
+I created this module not so much because doing so is a necessity; it
+is mostly because I admittedly have a big, fat mouth and told a friend of
+mine that I could write a module for this.  But it's also good to have a
+module that brings the GTK+ 3.24.9-and-later behavior to older versions
+of GTK, I suppose.  Either way, my fat mouth has cost me and you're seeing
+the fruits of my embarassing talkativeness.  But that's enough on the
+topic of my fat mouth.
+
+### Planned modules for the future
+
+ * A "GTK Inspector"-like tool for GTK+ 2 would be quite cool and useful.
+   Better yet, it doesn't need to be loaded all the time -- just when you
+   think you'll need to debug a GTK program!
+
+ * A module to add scrollbar stepper buttons to the ends of scrollbars on
+   GTK 4 is in the works.  I actually have it working, I just need to
+   commit it to this repository and clean it up a little.
+
+If you have any further ideas on what you want in GTK, please file an
+issue on this repository!  Pull requests are also welcome.  If you
+find an issue in one of these modules, please start an issue for that,
+too.
+
+***
+
+Thanks for checking out (pun intended) this repository!
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..291f0b0
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,33 @@
+project('sgm', 'c',
+  version : '0.90.0',
+  default_options : ['warning_level=3'],
+  license: 'LGPLv2.1+')
+
+
+gtk_dep = dependency('gtk+-3.0', version: '>= 3.8.0')
+
+modules_subdir = 'gtk-3.0/modules'
+modules_install_dir = join_paths(gtk_dep.get_variable(
+  pkgconfig: 'libdir',
+  internal: 'libdir',
+  default_value: get_option('libdir')), modules_subdir)
+
+
+# Don't enable this until the module is ready to go.
+#shared_module('sgm-overlay-scrolling-override',
+#  sources: [
+#    'sgm-overlay-scrolling-override.c',
+#  ],
+#  dependencies: [ gtk_dep ],
+#  install_dir: modules_install_dir,
+#  install: true,
+#)
+
+shared_module('sgm-flexible-mnemonics',
+  sources: [
+    'sgm-flexible-mnemonics.c',
+  ],
+  dependencies: [ gtk_dep ],
+  install_dir: modules_install_dir,
+  install: true,
+)
diff --git a/sgm-flexible-mnemonics.c b/sgm-flexible-mnemonics.c
new file mode 100644
index 0000000..8249c95
--- /dev/null
+++ b/sgm-flexible-mnemonics.c
@@ -0,0 +1,121 @@
+/*
+ * SGM -- The STLWRT-ian GTK Modules
+ * Copyright (C) 2021 Gordon N. Squash.
+ *
+ * This module is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This module is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this module; see the file COPYING.  If not,
+ * write to the Free Software Foundation, Inc., 51 Franklin Street,
+ * Fifth Floor, Boston, MA  02110-1301  USA.
+ */
+
+/*
+ * This module, "sgm-flexible-mnemonics", adds the code back to GTK to
+ * configure the display of mnemonics -- mnemonics being the underlined
+ * letters in menu items and buttons which, when the corresponding letter
+ * key is pressed, activates the menu item or button in question.
+ * Historically, GTK has allowed the user to alter whether mnemonics are
+ * displayed at all and whether mnemonics are displayed all the time, or
+ * only when the user presses a modifier key, seemingly about to activate
+ * one of the widgets with a mnemonic.  Since GTK+ 3.9.8 (development
+ * version of GTK+ 3.10), however, the behavior of mnemonics has been
+ * hard-coded in GTK, and people who don't like the new default GTK
+ * behavior are left frustrated that they, for example, can't see menu
+ * mnemonics all the time.  This module adds the configurability back
+ * to GTK.
+ *
+ * This module uses a slightly round-about hack to always display mnemonics.
+ * This module hooks into the "size_allocate" function of each and every
+ * GtkLabel, and ensures the label's toplevel window has the
+ * "mnemonics-visible" property set to TRUE.  It would be nice to simply
+ * hook into a GtkWindow's "mnemonics-visible" property and reset the
+ * property to TRUE if it is ever set to FALSE by GTK.  However, this
+ * doesn't work so well in practice, since in reality mnemonics are
+ * displayed globally and then hidden on a per-label basis.  Hence we need
+ * to ensure that no label has mnemonics turned off, if "gtk-auto-mnemonics"
+ * is set to FALSE.
+ */
+
+
+#include <gtk/gtk.h>
+#include <glib.h>
+
+
+static void (*original_gtk_label_size_allocate) (GtkWidget     *widget,
+                                                 GtkAllocation *allocation);
+
+static void sgm_gtk_label_size_allocate         (GtkWidget     *widget,
+                                                 GtkAllocation *allocation);
+
+
+/* Function definitions */
+G_MODULE_EXPORT const char *
+g_module_check_init (GModule *module)
+{
+  /*
+   * Exit immediately on GTK+ versions prior to 3.9.8.  This is because
+   * configurable mnemonics support was removed in 3.9.8, and this
+   * module is unnecessary on earlier versions of GTK+.
+   */
+  if (gtk_check_version (3,9,8) != NULL)
+  {
+    return "Your version of GTK+ is old enough that this module is redundant.\n"
+           "This module will therefore not load.";
+  }
+
+  /*
+   * Otherwise, this module is useful for the current version of GTK+, so
+   * proceed with loading it.
+   */
+  else
+  {
+    g_module_make_resident (module);
+    return NULL;
+  }
+}
+
+G_MODULE_EXPORT int
+gtk_module_init (gint * argc, char *** argv)
+{
+  GtkWidgetClass *gtk_label_class;
+
+  (void) argc;
+  (void) argv;
+
+  gtk_label_class = g_type_class_ref (GTK_TYPE_LABEL);
+  original_gtk_label_size_allocate = gtk_label_class->size_allocate;
+  gtk_label_class->size_allocate = sgm_gtk_label_size_allocate;
+  g_type_class_unref (gtk_label_class);
+
+  return 0;
+}
+
+
+static void
+sgm_gtk_label_size_allocate (GtkWidget     *widget,
+                             GtkAllocation *allocation)
+{
+  GtkWidget   *toplevel_window;
+  GtkSettings *settings;
+  gboolean     auto_mnemonics;
+  gboolean     mnemonics_visible;
+
+  original_gtk_label_size_allocate (widget, allocation);
+
+  toplevel_window = gtk_widget_get_toplevel (widget);
+  settings = gtk_widget_get_settings (toplevel_window);
+  g_object_get (settings, "gtk-auto-mnemonics", &auto_mnemonics, NULL);
+  g_object_get (toplevel_window, "mnemonics-visible", &mnemonics_visible, NULL);
+
+  if (!mnemonics_visible && !auto_mnemonics)
+    g_object_set (toplevel_window, "mnemonics-visible", TRUE, NULL);
+}
diff --git a/sgm-overlay-scrolling-override.c b/sgm-overlay-scrolling-override.c
new file mode 100644
index 0000000..13116af
--- /dev/null
+++ b/sgm-overlay-scrolling-override.c
@@ -0,0 +1,144 @@
+#include <gtk/gtk.h>
+#include <glib.h>
+
+
+enum
+{
+  /*
+   * In GTK+ 3.24.9 and later, the "overlay-scrolling" property is assigned
+   * a property number of 85.  We might as well follow that convention here
+   * and avoid any property number collisions.
+   */
+  PROP_OVERLAY_SCROLLING = 85
+};
+
+
+static gboolean     overlay_scrolling_enabled = TRUE;
+
+static GParamSpec * gtk_overlay_scrolling_pspec;
+
+
+static void (*original_gtk_settings_set_property) (GObject      *object,
+                                                   guint         property_id,
+                                                   const GValue *value,
+                                                   GParamSpec   *pspec);
+
+static void (*original_gtk_settings_get_property) (GObject      *object,
+                                                   guint         property_id,
+                                                   const GValue *value,
+                                                   GParamSpec   *pspec);
+
+
+static void overridden_gtk_settings_set_property (GObject      *object,
+                                                  guint         property_id,
+                                                  const GValue *value,
+                                                  GParamSpec   *pspec);
+
+static void overridden_gtk_settings_get_property (GObject      *object,
+                                                  guint         property_id,
+                                                  const GValue *value,
+                                                  GParamSpec   *pspec);
+
+
+G_MODULE_EXPORT const char *
+g_module_check_init (GModule *module)
+{
+  /*
+   * Exit immediately on GTK+ versions prior to 3.15.0, since overlay
+   * scrolling hadn't been introduced yet!
+   */
+  if (gtk_check_version (3,15,0) != NULL)
+  {
+    return "Your version of GTK+ is too old to support overlay scrolling.\n"
+           "This module is thus unnecessary and you should remove it.";
+  }
+
+  /*
+   * Similarly, a property was introduced in GTK+ 3.24.9 to disable overlay
+   * scrolling globally, making this module redundant.
+   */
+  else if (gtk_check_version (3,24,9) == NULL)
+  {
+    return "Your version of GTK+ already supports globally disabling overlay scrolling.\n"
+           "This module is thus redundant and you should remove it.";
+  }
+
+  /*
+   * Otherwise, this module is useful for the current version of GTK+, so
+   * proceed with loading it.
+   */
+  else
+  {
+    g_module_make_resident (module);
+    return NULL;
+  }
+}
+
+G_MODULE_EXPORT int
+gtk_module_init (gint * argc, char *** argv)
+{
+  GtkSettingsClass *gtk_settings_class;
+  GtkScrolledWindowClass *gtk_scrolled_window_class;
+
+  (void) argc;
+  (void) argv;
+
+  gtk_settings_class = g_type_class_ref (GTK_TYPE_SETTINGS);
+
+  gtk_overlay_scrolling_pspec = g_param_spec_boolean ("gtk-overlay-scrolling",
+                                                      "Overlay Scrolling",
+                                                      "Whether to enable overlay scrolling mode globally",
+                                                      overlay_scrolling_enabled,
+                                                      G_PARAM_READWRITE);
+
+  g_object_class_install_property (gtk_settings_class,
+                                   PROP_OVERLAY_SCROLLING,
+                                   gtk_overlay_scrolling_pspec);
+
+  original_gtk_settings_set_property = G_OBJECT_CLASS (gtk_settings_class)->set_property;
+  G_OBJECT_CLASS (gtk_settings_class)->set_property = overridden_gtk_settings_class_set_property;
+
+  original_gtk_settings_get_property = G_OBJECT_CLASS (gtk_settings_class)->get_property;
+  G_OBJECT_CLASS (gtk_settings_class)->get_property = overridden_gtk_settings_class_get_property;
+
+  g_type_class_unref (gtk_settings_class);
+
+
+  
+
+  return 0;
+}
+
+
+static void overridden_gtk_settings_set_property (GObject      *object,
+                                                  guint         property_id,
+                                                  const GValue *value,
+                                                  GParamSpec   *pspec)
+{
+  switch (property_id)
+  {
+  case PROP_OVERLAY_SCROLLING:
+    overlay_scrolling_enabled = g_value_get_boolean (value);
+    break;
+
+  default:
+    original_gtk_settings_set_property (object, property_id, value, pspec);
+  }
+}
+
+
+static void overridden_gtk_settings_get_property (GObject      *object,
+                                                  guint         property_id,
+                                                  const GValue *value,
+                                                  GParamSpec   *pspec)
+{
+  switch (property_id)
+  {
+  case PROP_OVERLAY_SCROLLING:
+    g_value_set_boolean (value, overlay_scrolling_enabled);
+    break;
+
+  default:
+    original_gtk_settings_get_property (object, property_id, value, pspec);
+  }
+}