Issue Management Tool is Internet-based issue management software that allows ticket numbering for each issue as well as easy back-tracking capability for your research on past issues. It features an integrated message board, a drag-and-drop task manager, ticket emailing, a personal address book, XML imports/exports for third party software, open ticket listing with certain status, and many more features.
OTRS is a platform independent Web-based help desk system that supports service organization of any kind (e.g. IT service, customer and technical product service, complaint management, public services, etc.) to increase their efficiency. It increases transparency as well as service quality and lowers your total cost of ownership. It has been certified ITIL V3 compatible by PinkVERIFY for incident, problem, change, service asset and configuration, request fulfillment, and knowledge management. Other ITIL processes like service catalog and service level management are supported as well.