Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
productboard - Beautiful and powerful product management.
Zeplin - Collaboration app for UI designers & frontend developers
FastNetMon - FastNetMon is a very fast DDoS analyzer with sflow/netflow/mirror support.
Abstract - A secure, version-controlled hub for your design files
ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.