BugTracker.NET is a free, open-source, web-based bug or customer support issue tracker written using ASP.NET, C#, and Microsoft SQL Server (or its free cousin SQL Server Express). It is in daily use by thousands of development and support teams around the world. BugTracker.NET is easy to install and learn how to use. When you first install it, it is very simple and you can start using it right away. However, it offers you the ability to change its configuration to handle your needs if they are more complex.

BugNet Premium is extended version of open source defect tracking tool BugNet

Fishbone will be a web based project management application suite.

Countersoft Gemini Community Add-on's project providing users with additional integrations with Gemini, an ASP.NET Issue Tracker / Bug Tracker / Project Management platform.

Killer Defect And Bug Tracking System (Killdabugs) is a simple, effective and easy-to-use defect/bug tracking software that makes it easier for you to manage bugs in your projects. It's completely free and open-source. You can use it on your own host or freely at killdabugs.com.

Project Dashboard helps software project managers to manage, track and monitor health of various active software projects. This web application includes various features like requirement management, defect management, project matrics, release management and task management.

This is an addin to Internet Explorer that allows you to easily submit a defect about the page you are currently browsing. Because it is integrated into IE it can capture a significant amount of extra information that normally wouldn't get included in a defect report, this includes: - A Screen Shot of the page - The source HTML of the page - Any script files being used by the page - Any CSS pages that are referenced in the page - Details about the client browser configuration (e.g. screen resolution, browser version, ...) - Assign default values for any field in the defect report (e.g. Area, Iteration, Assigned To, ...)