Oomox is a tool that allows generating color variations of the popular Numix GTK2 / GTK3 theme, as well as icons to match them.

The application comes with a large number of built-in presets that can be further customized, and it supports GNOME, Unity, Xfce4 and Openbox.

The minimum GTK3 version required to use it is 3.18 (so it supports Ubuntu 16.04 and newer). The themes might work with older GTK3 versions, but you may encounter issues.

Oomox already had Unity support, but with the latest 1.2.0 version, themes generated with it now have the correct window buttons color instead of the default Numix color:

Variety is a wallpaper changer that can automatically download wallpapers from various sources, like Flikr, Wallhaven, Bing Photo of the Day, Unslash, Desktoppr, NASA's Astronomy Picture of the Day, as well as a live wallpaper of the world sunlight map. It can also automatically fetch wallpapers recommended by other Variety users.

The app was updated recently with a new "safe mode" option, which can be used to avoid NSFW and sketchy images. This feature relies on user ratings, so it's not perfect, at least until more users rate the wallpapers.

Oomox is a tool that allows creating different color variations of the popular Numix GTK2/GTK3 theme. It features built-in presets, so you can easily generate various themes without much effort, or you can use the tool to change the theme colors individually.