- Spell checker and Grammar checker by Ginger
- Spell Checker for Chrome
- SpiderHeck
- Splice
- Splice
- Split Tabs
- Splitgate
- Splix.io Mods
- SPOI Options
- SPORE™
- sportTV Muze Search
- SportTV Search
- SportTV Start
- Spotflux Lite
- Spotify
- SPOTS - A better way to start
- Spreed - speed read the web
- Sprint Reader - Speed Reading Extension
- Sprucemarks
- SPSS
- Spyro™ Reignited Trilogy
- Stacklands
- Stackup
- Standoff 2
- Star Citizen