HivePress - HivePress is a free WordPress plugin that allows you to build any type of directory and listing websites. It's incredibly easy to use and highly customizable.

SignUpGenius - SignUpGenius is a tool for scheduling events, sending out invitations, and managing your respondents all in one place.

Brilliant Directories - Brilliant Directories offers member management solution to streamline all aspects of membership website or association.

Volgistics - Volgistics is a volunteer management software solution, that helps to manage volunteers through the entire volunteer cycle.

phpListings.com - Start your own business directory website with customizable widget-based templates and effective listing monetization tools.

Bloomerang - Bloomerang is a simple donor database and fundraising software solution that helps nonprofits decrease donor attrition and increase revenue.