Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
PHPRad - PHPRad is an advanced application development environment capable of generating complete applications in PHP using various databases. Great tool for professionals, the best tool for beginners. Little or No Coding Experience Required
Salesforce Platform - Salesforce Platform is a comprehensive PaaS solution that paves the way for the developers to test, build, and mitigate the issues in the cloud application before the final deployment.
Linx - Integration and automation platform for growing businesses
AWS Lambda - Automatic, event-driven compute service
DHTMLX Suite - DHTMLX Suite offers JavaScript UI library for building cross-browser web and mobile applications.