tota11y - An accessibility visualization toolkit from Khan Academy
J2ME Loader - J2ME-Loader is a J2ME emulator for Android. It supports most 2D games and also 3D with some limitations (Mascot Capsule 3D games don't work). Emulator has a virtual keyboard, individual settings for each application, scaling support.
Nibbler - Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.
MicroEmulator - MicroEmu is a pure Java implementation of Java ME.
Page Speaker - Modern web accessibility tools for agencies & webmasters
Cemu - Highly experimental software to emulate Wii U applications on PC.