Adobe is offering their Adobe Creative Suite CS2 software for free (zip, nada, nothing). You'll need an Adobe Member account (sign-up is free) to download the software for PC, Mac, or both.
Once you login to the CS2 Downloads page, you'll be able to download the entire CS2 Standard Suite and/or individual applications:
- Adobe Creative Suite CS2 (Standard)
- Acrobat 3D 1.0 (Windows)
- Acrobat Standard 7.0
- Acrobat Pro 8.0
- Audition 3.0
- GoLive CS2
- Illustrator CS2
- InCopy CS2
- InDesign CS2
- Photoshop CS2
- Photoshop Elements 4.0/5.0
- Adobe Premiere Pro 2.0
The current version of Adobe Creative Suite is version 6, so CS2 is several editions behind. System requirements for CS2 are modest, though (Windows XP and a Pentium III or 4 processor or Mac OS X v.10.2.8-10.3.8, PowerPC G4 or G5). If you've got an older computer, these free downloads are well worth it if you have photo editing, illustration, or other design needs.
As far as I can tell, they also work on newer computers. I downloaded and ran Photoshop CS2 with no issues on a Windows 8 PC. (Edited to add: If you do have problems running the suite, check out the Slickdeals forum thread linked below, where SD members offer some troubleshooting tips.)
You might want to hurry and download the applications you need (or might need in the future) and print out the serial numbers while they're available.