Gitea - A painless self-hosted Git service
GitHub Gist - Gist is a simple way to share snippets and pastes with others.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
3Cols - Manage your code snippets in the cloud fast, easy and free for personal use forever.
GitBucket - GitBucket is the easily installable open-source GitHub clone written with Scala.
Simple Snippets - Simple Snippets is place to easily create and manage your code snippets. The main features of the Simple Snippets: code highlighting, snippet groups, public and private snippets.