SignUpGenius - SignUpGenius is a tool for scheduling events, sending out invitations, and managing your respondents all in one place.
Bloomerang - Bloomerang is a simple donor database and fundraising software solution that helps nonprofits decrease donor attrition and increase revenue.
Kindful - Nonprofit donor database + fundraising tools all in one
Volgistics - Volgistics is a volunteer management software solution, that helps to manage volunteers through the entire volunteer cycle.
Classy - Expressive, flexible, and powerful stylesheets for native iOS apps
InitLive - Volunteer and Staff Management Tool for Events