These are the apps ive found after a few days of messing with solus that are neat to mess with and the basic programs every nerd/novice needs.
Gimp: in the software centre just search it
Godot: simple beginner game engine supports solus just extract the Tar
Google Chrome: fast light weight browser with tons of apps/customization options.
Blender: Game engine with endless possibilities and modeling engine for animation.
Minecraft: most popular game in history Requires Java to play visit the wiki to install.
Plane Shift: MMORPG compatible with solus some of the mirrors dont work but try the others its a free game with a nice community and no payments.
EDIT: ive been absent to computer repair and my semester just finished and ive started my second semester and have had hell with school.