Free web based bug tracker/logging and reporting tools?
Can any one suggest me the free tools available for defect tracking and Reporting. The reporting sholud be in that tool. It shold be have the following features.
Reporting
1. Email notifications
2. Report the bug.
3. User can subscribe to get e-mail notification on specific bug.
4. can add new bugs and can give reports, search the bugs using ID number.
5. Capture the images 
6. Can create projects, sub projects and users.
7. Can customize the work flow and can find the status
I have find the Bug Tracker .net and Mantis. In Bug tracker .net, only we can view the report but we can not report the issue to development team. I have find out the "Track" tool, in that also same like Bug tracker .Net tool like no option for "Report an issue". 
In these three which one is good for defect logging/tracking and for reporting.
Thanks in advance.
Free web based bug tracker/logging and reporting tools?
===

Can any one suggest me the free tools available for defect tracking and Reporting. The reporting sholud be in that tool. It shold be have the following features.
Reporting
1. Email notifications
2. Report the bug.
3. User can subscribe to get e-mail notification on specific bug.
4. can add new bugs and can give reports, search the bugs using ID number.
5. Capture the images 
6. Can create projects, sub projects and users.
7. Can customize the work flow and can find the status
I have find the Bug Tracker .net and Mantis. In Bug tracker .net, only we can view the report but we can not report the issue to development team. I have find out the "Track" tool, in that also same like Bug tracker .Net tool like no option for "Report an issue". 
In these three which one is good for defect logging/tracking and for reporting.
Thanks in advance.