The following lists some other projects that use Mercurial as their primary SCM system. Projects using a different SCM may have a synchronized Mercurial repository.
1d6 roleplaying - free pen-and-paper roleplaying system (1w6.org) with Python implementation (rpg-1d6).
Adminton (アドミントン) contains a ton of useful things for admins, e.g. the Logbuch tools.
Argh! - an esoteric programming language.
beancount - double-entry bookkeeping software using text files for input (based on ledger).
Bitbucket Mercurial Hosting, written in Django.
Ccontrol - a utility for taming compiler versions, distcc, ccache etc.
GraphicsMagick - Portable image processing utilities, libraries, and GUIs.
gquilt - A GUI wrapper around quilt and Mercurials mq extension.
gwsmhg - A PyGTK GUI for managing work spaces using hg and the mq extension.
Hatta Wiki - A wiki engine using Mercurial for storage.
JCite - cites Java, Excel and text snippets from tests into documentation (literate testing).
MoNav is a Desktop / Mobile application that offers state-of-the-art fast and exact routing with OpenStreetMap Data.
NTFS-3G - NTFS driver for Linux with read and write support (FUSE driver).
Openbravo ERP - Web based ERP (Enterprise Resource Planning).
Pacha - A systems configuration management tool. Keeps track of directories in an automated way with Mercurial in the backend.
Paste Monkey - A Web 2.0 pastebin developed in CakePHP and jQuery with many advanced features and clean code base.
RainDoll - An encryption tool with a simple idea: keep it simple. No bells and whistles. Uses Rijndael from .NET.
RhodeCode - RhodeCode repository serving and browsing application written in pylons.
Virtual Ideal Functionality Framework - VIFF is a Python framework for secure multi-party computation (repository).
vcs - Various Version Control System management abstraction layer for Python.
WinMerge 3 WinMerge is an Open Source differencing and merging tool for Windows.