Gitea - A painless self-hosted Git service
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
GitBucket - GitBucket is the easily installable open-source GitHub clone written with Scala.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Google Cloud Functions - A serverless platform for building event-based microservices.