@pockets - Savage Worlds hasn't been mentioned. Its another Toolbox system like GURPS but geared more towards pulp stories and narratives.
- Fabula Ultima is an interesting system that plays like older JRPGs (think Chrono Trigger or old Final Fantasy).
- Anime5e takes the core mechanics of 5e and builds a point buy character creation system around them allowing for a new style of play with familiar mechanics.
- Ars Magica its a troupe style system built around its effect-based magic system.