According to Mantis Bug Tracker, it is an open source issue tracker that provides a delicate balance between simplicity and power. Users are able to get started in mintes and start managing their projects while collaborating with their teammates and client effectively. Once you start using it, you will never go back!.
Download : http://www.mantisbt.org/download.php
Demo : http://www.mantisbt.org/demo.php
Documentation : http://www.mantisbt.org/documentation.php
According to BugLogHQ, it is a free and open source tool to centralize the handling of automated bug reports from multiple applications. BugLogHQ provides a unified view of error messages sent from any number of applications and servers, allowing the developer to search, graph, forward, and explore the bug reports submitted by the applications.
Download : http://bugloghq.riaforge.org/
Documentation : https://github.com/oarevalo/BugLogHQ/wiki
According to LogDigger, it capture application errors with all the useful details and nail down bugs faster. LogDigger tools help you collect and classify detailed error reports and logs for your Java applications. In case of error, LogDigger collects request-level logs, context and environment details and notifies you instantly. With error insights provided by LogDigger, developers can reproduce and track down issues faster.
Download : http://logdigger.com/logdigger-connector/#download
Documentation : http://docs.logdigger.com/Connector/Getting_Started_with_LogDigger_Connector.html
Its free for public projects, but it is only free for 1 private projects if you have a team of 3 or less. According to Snowy Evening, it brings your clients and community together. It is beautifully designed bug tracking that makes powerful features easy to use. You'll be more efficient with painless GitHub and jsFiddle integration. You need to create an account for downloading the API.
According to BugNET, it is an open source issue tracking & project management application. BugNET's web interface makes it simple to file, manage, and report bugs. You can even customize issue types, status, priority and many more fields to match your existing workflows and quickly adapt to changes as your processes evolve.
Download : http://www.bugnetproject.com/downloads
Documentation : https://github.com/dubeaud/bugnet/wiki
According to BugZilla, it is a "Defect Tracking System" or "Bug-Tracking System". Defect Tracking Systems allow individual or groups of developers to keep track of outstanding bugs in their product effectively. Most commercial defect-tracking software vendors charge enormous licensing fees. Despite being "free", Bugzilla has many features its expensive counterparts lacks. Consequently, Buzilla has quickly become favorite of thousands of organizations across the globe.
Download : http://www.bugzilla.org/download/
Documentation : http://www.bugzilla.org/docs/
According to WebIssues, it is an open source, multi-platform system for issue tracking and team collaboration. It can be used to store, share and track issues with various attributes, description, comments and file attachments. It is easy to install and use but has many capabilities and is highly customizable.
Download : http://webissues.mimec.org/downloads
Demo : http://demo.mimec.org/client/index.php
Documentation : http://wiki.mimec.org/wiki/WebIssues
According to eTraxis, it is an open source bug tracking system with ability to set up unlimited number of fully customizable workflows. eTraxis can be used for tracking almost anything, but the most popular cases are a bugtracker, a helpdesk, and even a CRM system. A free plan includes 5 user accounts, distinct subdomain.
Documentation : https://www.etraxis.com/docs/getting-started
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