Twilio.org's Rapid Response Kit - Collection phone-related tools using Twilio's service. Kit includes: Auto-Respond (inbound voice/sms responder), Broadcast (simple way to broadcast texts/calls to a list), Conference Line, Forwarder, Ringdown (call down a list of people, if 1st person doesn't answer go on to the next), Help Line (Press 1 for..., Press 2 for...)
Ushahidi - Platform for data management and visualization. Other tools include CrowdMap, CrisisNET (data about world crises), Ping (tool for checking is someone is ok after an emergency), SMSsync (two-way SMS gateway). Check out their github repos.