...use Google? - Although you possibly did this already given you know about Adobe?
So some pointers:
Your camera will have normally come with a RAW editor - for Canon this is Digital Photo Professional.
Other manufacturers have their own systems - Phocus for Hasselblads for example.
Alternatively, you can search for an open source or other RAW converter. One free RAW editor is RAW Therapee - http://rawtherapee.com/ (Though I don't like the highlight results from it).
I am sure a google search for free RAW editors will offer many other alternatives.
Of course as you mention Adobe, ascending by cost:
- Photoshop Elements
- Photoshop CS