Which tool is good for Defect tracking/Logging in testing for testers?

Any one can give the information about which tools are free for Defect Tracking/Logging and For Reporting the Bugs on the net. I have searched there is no free tools are available for defect tracking on the net. I have find out some tools Bontq, FogBugz, Mantis, Dev Track and Bugzilla. b开发者_运维技巧ut these all are paid up tools only. I have registered for free trail version, In that I felt Bontq is good for adding Bugs, adding cases and then email notifications and for reporting the information to developers. Can any body please suggest me, Thank you in advance.

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There are many topics on that matter. I suggest you look through them.

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[Mantis][1] is free and easily customisable

[1]: http://www.mantisbt.org/ Mantis

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Check out Assembla

Open source projects are free on Assembla. But that might not be your case.

Mantis is free by the way.

FogBugz is free in the following case:

The FogBugz Student and Startup Edition allows teams of one or two people to use a complete, full-featured version of FogBugz, professionally hosted at our data center, at absolutely no cost