Review of Seatable powered by the Slant community.
Seatable is an online or self-hosted lightweight database with a spreadsheet like interface. It is based on the open source Seafile project.
Read article Realizing Custom Applications with SeaTable Scripts.
SpecsUpdate
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Pros
Pro Free version
Free version allows up to 25 users.
Pro Online or self-hosted
Pro API
Rest API for developers.
Pro Calculations
Supports calculations and Excel style formulas.