Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Azendoo - Azendoo is a collaborative task management solution that helps companies to get work done easily and in teams.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
Taskade - Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.
Ragic - World's most advanced online database engine. Build powerful online databases with simple Excel style online interface.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.