VoIP Drupal is a unified communications framework that brings the power of voice and Internet-telephony to Drupal sites. It can be used to build hybrid applications combining regular touchtone phones, web, SMS, Twitter, IM and other communication tools in a variety of ways, including:

• Voice- and SMS-based Get Out The Vote campaigns
• 2-1-1 and 3-1-1 lines (information hotlines)
• Phone-based community surveys
• PTA or any meeting reminder calls
• Story recording / playback
• Group voicemail
• Geo-based call-blasts aimed at specific streets or locations
• And much more!