Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.
Bloomerang - Bloomerang is a simple donor database and fundraising software solution that helps nonprofits decrease donor attrition and increase revenue.
Jackmail - A newsletter plugin for Wordpress.
Kindful - Nonprofit donor database + fundraising tools all in one
Wordfence - Comprehensive security plugin for WordPress.
DonorPerfect - Nonprofits use DonorPerfect Fundraising Software for their Donor Management, Grant & Gift Tracking, Moves Management, Mass Mailing needs and more.