Description: jsFiddle is an online code editor that allows users to create, edit, debug and share HTML, CSS and JavaScript code snippets. It's useful for testing code, sharing examples, and prototyping web apps quickly.
Type: software
Pricing: Free
Description: OpenSignal is a free app that allows users to map cellular, Wi-Fi, and other signals in their area. It crowdsources data from users' devices to build maps showing the coverage and performance of various networks.
Type: software