I use PS Elements 7. It does everything I need it to do w/o the learning curve of CS3 or 4 programs. And the cost to buy it online is a fraction of the others. I love it. :)
My software Not as advanced as some of the photographers here....but here are my favourite programs... 1. Lightroom 2 (best upgrade EVER from version 1 to 2) 2. Elements 7 3. Topaz Adjust Plugin 4. Noiseware Pro Plugin 5. Photomatix 6. Panorama Factory