vBulletin - Build a community website with the leading forum software, vBulletin 5 Connect, or in the cloud on vB Cloud!
Zeplin - Collaboration app for UI designers & frontend developers
NationBuilder - The world's first platform for leaders, handcrafted from scratch to help you grow your community and lead them to action.
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
Mobilize - Mobilize is a scalable messaging app built for large groups.
ActiveWords - Auto correct on steroids