Packages with the gtk2 use flag

app-admin / gtkdiskfree : Graphical tool to show free disk space like df

Support GTK+ 2.x instead of GTK+ 3.x

app-i18n / fcitx : Fcitx (Flexible Context-aware Input Tool with eXtension) input method framework

Install input method module for GTK+ 2

app-i18n / ibus : Intelligent Input Bus for Linux / Unix OS

Enable the GTK-2 input method module

app-i18n / uim : A multilingual input method framework

Enable support for x11-libs/gtk+:2

dev-lang / lazarus : feature rich visual programming environment emulating Delphi

Use gtk:2 for widgets.

media-gfx / graphviz : Open Source Graph Visualization Software

Enables gtk+ output plugin -Tgtk (needs cairo)

media-libs / libcanberra : Portable sound event library

Enables building of gtk+ helper library, gtk+ runtime sound effects and the canberra-gtk-play utility. To enable the gtk+ sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.

media-libs / lvtk : A set of C++ wrappers around the LV2 C API

Enable x11-libs/gtk+:2 based GUI support

media-libs / suil : Lightweight C library for loading and wrapping LV2 plugin UIs

Enable GTK2 based GUI support

net-analyzer / pinger : Cyclic multi ping utility for selected adresses using GTK/ncurses

Install the gtkpinger GUI utility based on x11-libs/gtk+:2

net-misc / putty : A Free Telnet/SSH Client

Build the PuTTY client with x11-libs/gtk+:2 instead of x11-libs/gtk+:3

www-client / netsurf : A free, open source web browser

Build GTK2 GUI

x11-misc / appmenu-gtk-module : Application menu module for GTK

Build module for GTK+2

x11-themes / arc-theme : A flat theme with transparent elements for GTK 2/3/4 and GNOME Shell

Install GTK+2 theme

x11-themes / zuki-themes : Zuki themes for GTK, gnome-shell and more

Install GTK+2 theme