Various modifications of the original game, alongside fangames of it have been created since Soup 0.9's release.
Below is a list of all ones that I know of.
Mods • Translations • Fangames • Recreations • Tutorials
Mods are modified versions of the vanilla game, where creator(s) make their own version of the game with their own ideas.
• soupq and souqqqqqq, made by ijjjjjjjjjjjjjjjjjjjjjjj
• Rooms Of The Room Rooms, made by Agent-RedJackal
• VineRooms, made by Agent-RedJackal
• BOOPowo, made by Fishy Pug Bruh
• Soap Soup, led by Kite Line
• puos, made by... AcceleratingWind...
A sub-section of Mods, Translations merely translate the text contents of the game in a different language.
• Russian Translations, made by AcceleratingWind
Fangames are games inspired by the original game, without directly modifying it.
• Lucid, made by FloofyNezzled
• Soft.Ware:0.2, led by AcceleratingWind
• absinthe, made by yoka
• SOUP (placeholder name), led by Kite Line
Recreations simply recreate Soup 0.9 in different ways instead.
• Roblox recreation, made by kkurisu
• VR Chat recreations, made by Trixelized
• Unity recreation on Game Jolt, made by CruFro, it can be played in your browser
Both hosma and Agent-RedJackal have made video tutorials about modding the game. These can be helpful if you want to make your own Soup 0.9 mod.