Diggit is an agile tool that allows you to analyze git repositories.

Entitlements plugin to manage GitHub Orgs and Team memberships and access

Entitlements plugin for a robust audit log

Elasticsearch integrations for indexing git repositories.

git-ready gets you ready to work with an established team that already uses GitHub.

command-line integration with semaphoreci.com for git repositories

Gitstamp Command-Line Interface (CLI)

Git eXtensions for improved development workflows

Heroku Utility.

Jekyll's built-in include tag only supports including files within the _includes folder. This plugin supports 4 types of includes: absolute filenames, filenames relative to the top-level directory of the Jekyll web site, filenames relative to the user home directory, and executable filenames on the PATH.

A collection of scripts for common git tasks to simplify and improve workflow.

Dolt API for serving git trees and syntax highlighted blobs

email-in for static blogs like Middleman. Uses Mailman to poll an account.

migreazy helps manage Rails migrations across git branches.

Provides support to developers of NDR projects

Lightweight Configuration Management Database

Poper makes sure that your git commit messages are well-formed

Package indexer for git-based ReaPack repositories

Mine repositories for interesting changes over time

A library to discover amazing things about a SHA1 hash (or MD5 or whatever). It's sha-mazing. Almost as shamazing as that pun.