What are some alternatives?
Zoho Creator - Create custom apps for your unique business needs.
CUBA.platform - A Full Stack Enterprise Java Framework with lots of out of the box functionality and amazing...
Knack - Knack is the easiest, most spectacular business management software available.
Microsoft PowerApps - Microsoft PowerApps provides tools to create, customize, share and run apps.
Podio - Podio is the online work platform. Manage, share, and get your work done smarter together with tools that work like you. Free for 10 Users.
OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.