While not free I have been using cronusmax to use my PS3 controller and WiiU Pro Controller. Both show up as 360 pads to dolphin/windows and work fine.
http://controllermax.com/cross-over-gaming/
This device lets you take a PS3,PS4,360,X1,Wii,WiiU controller and plug it into any of those consoles/windows but a the Wii or WiiU. This might change in the future because of the new smash adapter they are releasing for the WiiU.
I use this bluetooth adapter, was plug-in-play for windows 7. To connect the controllers to the cronus wirelessly.
http://www.amazon.com/gp/product/B003765X38/ref=wms_ohs_product?ie=UTF8&psc=1
They posted a thread showing off a newer model.
http://controllermax.com/forums/showthread.php?t=143096
I like it because you can take whatever is your favorite controller and just use it for whatever system you want more or less.
http://controllermax.com/cross-over-gaming/
This device lets you take a PS3,PS4,360,X1,Wii,WiiU controller and plug it into any of those consoles/windows but a the Wii or WiiU. This might change in the future because of the new smash adapter they are releasing for the WiiU.
I use this bluetooth adapter, was plug-in-play for windows 7. To connect the controllers to the cronus wirelessly.
http://www.amazon.com/gp/product/B003765X38/ref=wms_ohs_product?ie=UTF8&psc=1
They posted a thread showing off a newer model.
http://controllermax.com/forums/showthread.php?t=143096
I like it because you can take whatever is your favorite controller and just use it for whatever system you want more or less.