Re: Best open source tool to test Client server appln
If you are looking for black box GUI testing and you don't mind the image based testing approach, try our T-Plan Robot. As testing is performed on the desktop image level through VNC, the underlying AUT framework is irrelevant and the only requirement is that your AUT system is able to run a VNC server.
The tool is available under GPL 2.0 and higher and the source code as well as binary distros are on SourceForge. We've recently released a tutorial which should help you to evaluate it quickly. Help yourself and let me know if you have any questions.