QTL.com website is currently under reconstruction.

If you are looking for software for QTL mapping, please click here and download a copy of QTLNetwork [Latest release (10/17/2007) QTLNetwork-2.0-Setup.exe]. This software is free and was rated as the best QTL software by the former QTL.com community. 

Please note that the former QTL.com community has no official links or relationships of any kind with the QTLNetwork developers. The recommendation made here is solely based on an online public survey at the old QTL.com forum.  There are a wide range of QTL mapping software available, and new mapping software is released from time to time.  My personal view is that all mapping packages are good. Different software suits different experimental designs and studies.  Please use your own due diligence to choose the right software for your study.