PT Online
- PT Online is a hosted bug and defect tracking solution using ProblemTracker. Other applications include helpdesk, support, workflow, and process and change management.
- http://www.netresultstracker.com/pt_online.html

AceProject
- Offers web-based software for project management, bug tracking and timesheet management.
- http://www.aceproject.com/

BugMonitor.com
- Hosted bug tracking, issue management, and defect management for software developers and QA personnel. 45 day trial available.
- http://www.bugmonitor.com

Bug-Track.com
- Bug tracking system with email notification, file attachment, tracking history, bilingual pages, 128-bit encryption connection and advance customization.
- http://www.bug-track.com

Elementool
- Hosted bug and defect tracking and managing tool. Helps developers and testers to track and manage bugs and features. (elementool Inc.)
- http://www.elementool.com

SourceAction
- Secure online issue tracking application that allows companies to track, manage, resolve, and report on defects and enhancement requests from customers and internal users.
- http://www.sourceaction.com

Squish
- Web-based system for bug and issue tracking, and project management.
- http://www.squishlist.com

Defect Tracker
- Subscription-based web tracking of software defects. Clean user interface, extensive reporting, and rule-based email notification.
- http://www.defecttracker.com/

BugCentral.com
- Web based bug tracking tool
- http://www.bugcentral.com

AdminiTrack
- Subscription web-based Issue and Defect Tracking Service.
- http://www.adminitrack.com

Bughost
- Web-based bug tracking application which provides a centrally-located repository of bugs found in applications.
- http://www.bughost.com