Topicbox - Put team emails into one centralized, searchable place
Donorhut - Donorhut offers cloud fundraising software for charities and non-profits of any size.
Nova Inbox - Personalize emails in seconds, right from your inbox
Txt2Give - Txt2Give helps churches, non-profits, schools, alumni associations, and political campaigns receive donations with text messages.
InboxSDK - First usable API to write Gmail Apps for 1B active users
Little Green Light - Illuminating Data. Advancing Nonprofits.