Postman might not be an app that a regular user would opt to install, but if you're a developer, well, then this app can do you much good. Postman will help you build APIs faster by offering you a simple-to-use GUI, and offering you a ton of various options. Postman is actually one of the most popular development applications for Chrome at the moment, if not the most popular one, and it's free.

Install Postman

Grammarly is actually more of an extension of Chrome than an actual app, but this tool is so useful we simply had to list it here. Once installed, Grammarly will check whatever you write in Chrome and make sure that the grammar is spot on, well, this tool can only do so much, but it will make sure that you don't have any obvious typos or mistakes in your text. Having said that, a paid subscription is available, which can make this tool a lot more useful.