Installable asp.net web application. You'll need MS SqlServer Express, IIS Server and .NET 2.0 (webolize_requirements.exe will download and install the requirements).
Although all the source code for the zip has open source, the release is a commercial license to simplfy things.
Webolize IssueTracker - is GPL licensed and
Cuyahoga CMS - is BSD licensed
so - if you want a GPL licensed product simply download the source code (from Source Code tab) and compile yourself, or if you are ok with a FREE commercial issuetracker download the zip here which includes everything you need.