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OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
Microsoft PowerApps - Microsoft PowerApps provides tools to create, customize, share and run apps.
Ragic - World's most advanced online database engine. Build powerful online databases with simple Excel style online interface.
jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.