Black Falcon Software produces commercial software at very reasonable prices as well as open-source software tools for the .NET Developer Community.
Black Falcon Software's flagship product is "SQL Server Source Control for Developers". This software allows developers working with the SQL Server database to version their database object scripts in the same manner that more expensive, competitive products provide for. The difference is that this tool provides a complete, localized solution instead of requiring a remote server in the same manner as Mercurial Source Control provides for similar application source control without the additional peer provided repository option.