Both GitHub and GitLab allow you to "star" repositories, and Bitbucket lets you "watch" them. "Starring" or "watching" lets you keep track of repositories you find interesting, but none of the services provide ways to search or tag your repositories so you can easily find them. Limo lets you manage your starred repositories from the command line. You can do things like tag them, search them, or list them by language. Think of Limo as the CLI version of Astral (also worth looking into).