Edit Any Webpage - Edit any site on the fly - bookmarklet
PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.
Jam - Portable bluetooth speakers that set you and your jams free. Wireless speakers, great sound quality, and totally portable, need we say more?
AbTest.io - A free url shortener with A/B testing features
EditMode - Update website texts in real-time and get a sharable link.
Marpipe - Automate Your Ad Testing, Optimize Your Creative