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.
Confluence - Confluence is content collaboration software that changes how modern teams work
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.