Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
Cloze - Smarter Relationship Management
Bizness Apps - Create your own app or become a reseller and build apps for others
Propeller CRM - Small business CRM with deep Gmail integration
BuildFire - BuildFire is the easiest way for small businesses to build a mobile app in a matter of minutes for iOS and Android.
Streak - Manage customers inside Gmail