Feel welcome to recommend some free games and/or mods for other people to find.
I'm not talking about games that temporarily go free though - they need to be always free (or have become permanently free).
I'll start, but all of my recommendations are for Steam:
Games:
Dr. Langeskov, The Tiger, and the Terribly Cursed Emerald: A Whirlwind Heist
https://store.steampowered.com/app/4...irlwind_Heist/
Heroine's Quest: The Herald of Ragnarok
https://store.steampowered.com/app/2...d_of_Ragnarok/
Cinderella Phenomenon
https://store.steampowered.com/app/5...eVisual_Novel/
SC2VN - The eSports Visual Novel
https://store.steampowered.com/app/4..._Visual_Novel/
Mods:
Portal Stories: Mel (Portal 2 Mod)
https://store.steampowered.com/app/3...l_Stories_Mel/
That's all for now.