Desktop cusomization -> add Oomox theme generator

README.md

@@ -180,6 +180,7 @@ Two Chinese version of this list are available [here](https://github.com/alim0x/
 - [Macbuntu](http://www.noobslab.com/2016/04/macbuntu-1604-transformation-pack-for.html) - A transformation pack for making your desktop look like a macOS. ![Freeware][Freeware Icon]
 - [Numix Icon Theme](http://www.noobslab.com/2014/04/install-numix-icon-packs-in-ubuntulinux.html) - One of the best icon themes for Ubuntu Linux.[![Open-Source Software][OSS Icon]](https://github.com/numixproject/numix-icon-theme) ![Freeware][Freeware Icon]
 - [Numix Theme](https://itsfoss.com/install-numix-ubuntu/) - A good popular theme. [![Open-Source Software][OSS Icon]](https://github.com/numixproject/numix-gtk-theme) ![Freeware][Freeware Icon]
+- [Oomox theme generator](https://github.com/actionless/oomox) - Graphical application for generating different color variations of a Numix-based and Flat-Plat themes (GTK2, GTK3), Gnome-Colors and Archdroid icons. ![Open-Source Software][OSS Icon]
 - [Papirus Icon Theme](https://github.com/PapirusDevelopmentTeam/papirus-icon-theme-gtk/) - SVG icon theme for Linux systems, based on Paper with a few extras like (hardcode-tray support, kde-color-scheme support, libreoffice icon theme, filezilla theme, smplayer themes ...) and other modifications. The theme is available for GTK and KDE. [![Open-Source Software][OSS Icon]](https://github.com/PapirusDevelopmentTeam/papirus-icon-theme-gtk/) ![Freeware][Freeware Icon]
 - [Unity Tweak Tool](https://apps.ubuntu.com/cat/applications/unity-tweak-tool/) - Must-have app for Ubuntu Unity customization. [![Open-Source Software][OSS Icon]](https://github.com/ianyh/Amethyst) ![Freeware][Freeware Icon]
 - [Wpgtk](https:github.com/deviantfero/wpgtk) - A universal theming software for all themes defined in text files, compatible with all terminals, with default themes for GTK2, GTK+, openbox and Tint2 that uses pywal as it's core for colorscheme generation.