Not aimed at Sat, in particular... if you're short of cash, DPP, the software that comes with Canon SLRs has a basic RAW converter built in. If you open the image, you can change basic things like brightness, contrast, colour temperature and then save as a jpeg.
I've just recently downloaded the upgrade for CaptureOne LE (4.1...) and I have Photoshop. But the problem is, if it's more than one or two pics, it's a long winded process.
Currently shooting in RAW+JPEG but soon to go RAW only once I've ordered Lightroom. Not sure when version 2 comes out and might wait.