Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Retool - Build custom internal tools in minutes.
NocoDB - The Open Source Airtable alternative
Airtable Universe - Real workflows from real people
Fieldbook - Create a database, as easily as a spreadsheet
Airportal - Instant customer portals from your Airtable base