diff --git a/c/gettext-gtk/Makefile b/c/gtk/gettext-gtk/Makefile
similarity index 100%
rename from c/gettext-gtk/Makefile
rename to c/gtk/gettext-gtk/Makefile
diff --git a/c/gettext-gtk/helloworld.c b/c/gtk/gettext-gtk/helloworld.c
similarity index 100%
rename from c/gettext-gtk/helloworld.c
rename to c/gtk/gettext-gtk/helloworld.c
diff --git a/c/gettext-gtk/locale/helloworld.pot b/c/gtk/gettext-gtk/locale/helloworld.pot
similarity index 100%
rename from c/gettext-gtk/locale/helloworld.pot
rename to c/gtk/gettext-gtk/locale/helloworld.pot
diff --git a/c/gettext-gtk/locale/ru/LC_MESSAGES/helloworld.po b/c/gtk/gettext-gtk/locale/ru/LC_MESSAGES/helloworld.po
similarity index 100%
rename from c/gettext-gtk/locale/ru/LC_MESSAGES/helloworld.po
rename to c/gtk/gettext-gtk/locale/ru/LC_MESSAGES/helloworld.po
diff --git a/c/gettext-gtk/make_po.sh b/c/gtk/gettext-gtk/make_po.sh
similarity index 100%
rename from c/gettext-gtk/make_po.sh
rename to c/gtk/gettext-gtk/make_po.sh
diff --git a/c/gtk-hello/CMakeLists.txt b/c/gtk/gtk-hello/CMakeLists.txt
similarity index 100%
rename from c/gtk-hello/CMakeLists.txt
rename to c/gtk/gtk-hello/CMakeLists.txt
diff --git a/c/gtk-hello/gtk_hello.c b/c/gtk/gtk-hello/gtk_hello.c
similarity index 100%
rename from c/gtk-hello/gtk_hello.c
rename to c/gtk/gtk-hello/gtk_hello.c
diff --git a/c/gtk-test/CMakeLists.txt b/c/gtk/gtk-test/CMakeLists.txt
similarity index 100%
rename from c/gtk-test/CMakeLists.txt
rename to c/gtk/gtk-test/CMakeLists.txt
diff --git a/c/gtk-test/main.c b/c/gtk/gtk-test/main.c
similarity index 100%
rename from c/gtk-test/main.c
rename to c/gtk/gtk-test/main.c
diff --git a/c/gtk-tutorial/helloworld/helloworld.c b/c/gtk/gtk-tutorial/helloworld/helloworld.c
similarity index 100%
rename from c/gtk-tutorial/helloworld/helloworld.c
rename to c/gtk/gtk-tutorial/helloworld/helloworld.c
diff --git a/c/gtk-tutorial/helloworld/helloworld_with_box.c b/c/gtk/gtk-tutorial/helloworld/helloworld_with_box.c
similarity index 100%
rename from c/gtk-tutorial/helloworld/helloworld_with_box.c
rename to c/gtk/gtk-tutorial/helloworld/helloworld_with_box.c
diff --git a/c/gtk-tutorial/helloworld/packing_demo.c b/c/gtk/gtk-tutorial/helloworld/packing_demo.c
similarity index 100%
rename from c/gtk-tutorial/helloworld/packing_demo.c
rename to c/gtk/gtk-tutorial/helloworld/packing_demo.c
diff --git a/c/gtk-tutorial/helloworld/run_helloworld.sh b/c/gtk/gtk-tutorial/helloworld/run_helloworld.sh
similarity index 100%
rename from c/gtk-tutorial/helloworld/run_helloworld.sh
rename to c/gtk/gtk-tutorial/helloworld/run_helloworld.sh
diff --git a/c/gtk-tutorial/helloworld/run_helloworld_with_box.sh b/c/gtk/gtk-tutorial/helloworld/run_helloworld_with_box.sh
similarity index 100%
rename from c/gtk-tutorial/helloworld/run_helloworld_with_box.sh
rename to c/gtk/gtk-tutorial/helloworld/run_helloworld_with_box.sh
diff --git a/c/gtk-tutorial/helloworld/run_packing.sh b/c/gtk/gtk-tutorial/helloworld/run_packing.sh
similarity index 100%
rename from c/gtk-tutorial/helloworld/run_packing.sh
rename to c/gtk/gtk-tutorial/helloworld/run_packing.sh
diff --git a/c/gtk_hello_world/build.sh b/c/gtk/gtk_hello_world/build.sh
similarity index 100%
rename from c/gtk_hello_world/build.sh
rename to c/gtk/gtk_hello_world/build.sh
diff --git a/c/gtk_hello_world/hello_world b/c/gtk/gtk_hello_world/hello_world
similarity index 100%
rename from c/gtk_hello_world/hello_world
rename to c/gtk/gtk_hello_world/hello_world
diff --git a/c/gtk_hello_world/hello_world.c b/c/gtk/gtk_hello_world/hello_world.c
similarity index 100%
rename from c/gtk_hello_world/hello_world.c
rename to c/gtk/gtk_hello_world/hello_world.c
diff --git a/c/gtkmm-test/CMakeLists.txt b/c/gtk/gtkmm-test/CMakeLists.txt
similarity index 100%
rename from c/gtkmm-test/CMakeLists.txt
rename to c/gtk/gtkmm-test/CMakeLists.txt
diff --git a/c/gtkmm-test/gtkmm-test.cxx b/c/gtk/gtkmm-test/gtkmm-test.cxx
similarity index 100%
rename from c/gtkmm-test/gtkmm-test.cxx
rename to c/gtk/gtkmm-test/gtkmm-test.cxx