GitNex - GitNex is a free, open-source Android client for Git repository management tool Gitea.
Nullboard - Minimalist locally-stored kanban board / task list manager.
OctoDroid - Mobile GitHub client for Android.
Huboard - HuBoard is built from the ground up using the GitHub public API.
FastHub - Yet another open-source GitHub client app but unlike any other app, FastHub was built from scratch.
Octobox - Untangle your GitHub Notifications