Google Open Source - All of Googles open source projects under a single umbrella
Whereby (formerly appear.in) - Collaborate from anywhere - video meetings with no downloads
SmallDevTools - Handy developer tools with a delightful interface
Chaton - 1:1 video chat P2P open source
whatdevsneed - This is whatdevsneed.
Open Source Stash - The best open-source alternatives for you next maker project