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

Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.

Kindful - Nonprofit donor database + fundraising tools all in one

Grist - Grist makes it easy to transform spreadsheets into a custom database where data is truly actionable.

Classy - Expressive, flexible, and powerful stylesheets for native iOS apps

SeaTable - SeaTable is an innovative no-code platform for creating custom digital solutions without programming. Intuitively build user-defined databases, applications, and workflows.