Software Advice - Software Advice is a company that provides research and user reviews on software applications.

GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.

Capterra - Capterra helps millions of people find the best business software. With software reviews, ratings, infographics, and the most comprehensive list of the top business software products available, you're sure to find what you need at Capterra.

GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab

TrustRadius - TrustRadius is the site for professionals to share real world insights through in-depth reviews on business technology products.

BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.