Mantis refers to an open-source issue tracker that has the provision of a delicate balance between simplicity and power. This tracker helps users to get started in minutes and start managing their projects while collaborating with their teammates and clients in an effective manner.

Features:
E-Mail Notifications :You can keep your team and clients updated with notifications on issue updates, resolution, or comments.
Access Control: You have the leverage to control user access at a project level.
Customizable: Mantis provides flexibility to customize your issue fields, notifications, and workflow.
Mobile Support: Mantis supports Android, iPhone, and Windows Phone platforms.
Plugins: It has the provision of an ever-expanding library of plugins to add custom functionality to the Mantis Tracking system.