Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
AppSheet - AppSheet enables users to create mobile apps instantly for both OS and Android.
Ninox - Ninox is a human-friendly database. Create your own Business Application with Ninox that matches your workflow. Ninox lets you integrate CRM, ERP, HR and many more...
QuickBase - Quickbase provides a no-code operational agility platform that enables organizations to improve operations through real time insights and automation across complex processes and disparate systems.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.