OutSystems - Build Enterprise-Grade Apps Fast.
Bizness Apps - Create your own app or become a reseller and build apps for others
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
GoodBarber - GoodBarber is a mobile app creation platform.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
Fuse - Fuse is a UX tool suite for mobile app designers and developers.