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Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Microsoft PowerApps - Microsoft PowerApps provides tools to create, customize, share and run apps.
Knack - Knack is the easiest, most spectacular business management software available.
jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.