Simply Static - Never worry about WordPress hacks again.
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
WP2Static - Static site generator for WordPress
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
Lyket - A tool to quickly add like/clap/vote buttons on a website
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.