SignUpGenius - SignUpGenius is a tool for scheduling events, sending out invitations, and managing your respondents all in one place.
Benevity - Benevity offers online workplace giving, volunteering and grant management programs.
Volgistics - Volgistics is a volunteer management software solution, that helps to manage volunteers through the entire volunteer cycle.
Submittable - Submittable is an easy-to-use online submission manager.
Bloomerang - Bloomerang is a simple donor database and fundraising software solution that helps nonprofits decrease donor attrition and increase revenue.
Optimy - Customer-oriented sponsorship & grant management software