Useful Sites

networktest.twilio.com - WebRTC Diagnostics

https://networktest.twilio.com

speed-battle - Browser speed test

http://speed-battle.com

random.org - Random Data Generation

Generate random strings using varying character set:

https://www.random.org/strings/

privnote - Secure Self-Destructing Note Sharing

https://privnote.com/#

carbon - create and share images of your source code

carbon app, repo.