diff --git a/.gitignore b/.gitignore
index 05f52c67..7ba79838 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,6 +35,8 @@
 /puttytel
 /puttygen
 /pterm
+/puttyapp
+/ptermapp
 /fuzzterm
 /testbn
 /*.DSA
diff --git a/Recipe b/Recipe
index 81472f37..a6689285 100644
--- a/Recipe
+++ b/Recipe
@@ -322,6 +322,12 @@ pageant  : [X] uxpgnt uxagentc pageant sshrsa sshpubk sshdes sshbn sshmd5
 PuTTY    : [MX] osxmain OSXTERM OSXMISC CHARSET U_BE_ALL NONSSH UXSSH
          + ux_x11 uxpty uxsignal testback putty.icns info.plist
 
+ptermapp : [XT] GTKTERM uxmisc misc ldisc settings uxpty uxsel BE_NONE uxstore
+         + uxsignal CHARSET cmdline uxpterm version time xpmpterm xpmptcfg
+         + nogss gtkapp
+puttyapp : [XT] GTKTERM uxmisc misc ldisc settings uxsel U_BE_ALL uxstore
+         + uxsignal CHARSET uxputty NONSSH UXSSH UXMISC ux_x11 xpmputty
+         + xpmpucfg gtkapp
 fuzzterm : [UT] UXTERM CHARSET misc uxmisc uxucs fuzzterm time settings
 	 + uxstore be_none
 testbn   : [UT] testbn sshbn misc conf tree234 uxmisc
diff --git a/unix/gtkapp.c b/unix/gtkapp.c
new file mode 100644
index 00000000..73cdfaca
--- /dev/null
+++ b/unix/gtkapp.c
@@ -0,0 +1,175 @@
+/*
+ * gtkapp.c: a top-level front end to GUI PuTTY and pterm, using
+ * GtkApplication. Suitable for OS X. Currently unfinished.
+ *
+ * (You could run it on ordinary Linux GTK too, in principle, but I
+ * don't think it would be particularly useful to do so, even once
+ * it's fully working.)
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+
+#include <gtk/gtk.h>
+
+#define MAY_REFER_TO_GTK_IN_HEADERS
+
+#include "putty.h"
+
+char *x_get_default(const char *key) { return NULL; }
+
+#if !GTK_CHECK_VERSION(3,0,0)
+/* This front end only works in GTK 3. If that's not what we've got,
+ * it's easier to just turn this program into a trivial stub by ifdef
+ * in the source than it is to remove it in the makefile edifice. */
+int main(int argc, char **argv)
+{
+    fprintf(stderr, "launcher does nothing on non-OSX platforms\n");
+    return 1;
+}
+GtkWidget *make_gtk_toplevel_window(void *frontend) { return NULL; }
+void launch_duplicate_session(Conf *conf) {}
+void launch_new_session(void) {}
+void launch_saved_session(const char *str) {}
+#else /* GTK_CHECK_VERSION(3,0,0) */
+
+static void startup(GApplication *app, gpointer user_data)
+{
+    GMenu *menubar, *menu, *section;
+
+    menubar = g_menu_new();
+
+    menu = g_menu_new();
+    g_menu_append_submenu(menubar, "File", G_MENU_MODEL(menu));
+
+    section = g_menu_new();
+    g_menu_append_section(menu, NULL, G_MENU_MODEL(section));
+    g_menu_append(section, "New Window", "app.newwin");
+
+    menu = g_menu_new();
+    g_menu_append_submenu(menubar, "Edit", G_MENU_MODEL(menu));
+
+    section = g_menu_new();
+    g_menu_append_section(menu, NULL, G_MENU_MODEL(section));
+    g_menu_append(section, "Paste", "win.paste");
+
+    gtk_application_set_menubar(GTK_APPLICATION(app),
+                                G_MENU_MODEL(menubar));
+}
+
+static void paste_cb(GSimpleAction *action,
+                     GVariant      *parameter,
+                     gpointer       user_data)
+{
+    request_paste(user_data);
+}
+
+static const GActionEntry win_actions[] = {
+    { "paste", paste_cb },
+};
+
+static GtkApplication *app;
+GtkWidget *make_gtk_toplevel_window(void *frontend)
+{
+    GtkWidget *win = gtk_application_window_new(app);
+    g_action_map_add_action_entries(G_ACTION_MAP(win),
+                                    win_actions,
+                                    G_N_ELEMENTS(win_actions),
+                                    frontend);
+    return win;
+}
+
+extern int cfgbox(Conf *conf);
+
+void launch_duplicate_session(Conf *conf)
+{
+    assert(conf_launchable(conf));
+    new_session_window(conf, NULL);
+}
+
+void launch_new_session(void)
+{
+    Conf *conf = conf_new();
+    do_defaults(NULL, conf);
+    if (conf_launchable(conf) || cfgbox(conf)) {
+        new_session_window(conf, NULL);
+    }
+}
+
+void launch_saved_session(const char *str)
+{
+    Conf *conf = conf_new();
+    do_defaults(str, conf);
+    if (conf_launchable(conf) || cfgbox(conf)) {
+        new_session_window(conf, NULL);
+    }
+}
+
+void new_app_win(GtkApplication *app)
+{
+    launch_new_session();
+}
+
+static void activate(GApplication *app,
+                     gpointer      user_data)
+{
+    new_app_win(GTK_APPLICATION(app));
+}
+
+static void newwin_cb(GSimpleAction *action,
+                      GVariant      *parameter,
+                      gpointer       user_data)
+{
+    new_app_win(GTK_APPLICATION(user_data));
+}
+
+static void quit_cb(GSimpleAction *action,
+                    GVariant      *parameter,
+                    gpointer       user_data)
+{
+    g_application_quit(G_APPLICATION(user_data));
+}
+
+static const GActionEntry app_actions[] = {
+    { "newwin", newwin_cb },
+    { "quit", quit_cb },
+};
+
+int main(int argc, char **argv)
+{
+    int status;
+
+    {
+        /* Call the function in ux{putty,pterm}.c to do app-type
+         * specific setup */
+        extern void setup(int);
+        setup(FALSE);     /* FALSE means we are not a one-session process */
+    }
+
+    {
+        const char *home = getenv("HOME");
+        if (home) {
+            if (chdir(home)) {}
+        }
+    }
+
+    gtkcomm_setup();
+
+    app = gtk_application_new("org.tartarus.projects.putty.macputty",
+                              G_APPLICATION_FLAGS_NONE);
+    g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
+    g_signal_connect(app, "startup", G_CALLBACK(startup), NULL);
+    g_action_map_add_action_entries(G_ACTION_MAP(app),
+                                    app_actions,
+                                    G_N_ELEMENTS(app_actions),
+                                    app);
+
+    status = g_application_run(G_APPLICATION(app), argc, argv);
+    g_object_unref(app);
+
+    return status;
+}
+
+#endif /* GTK_CHECK_VERSION(3,0,0) */