Adobe officially made CS2 available for free around 2013, but only for existing, paying customers of that specific version. They removed the activation servers, so they provided serial numbers to anyone—but the license agreement technically still requires you to have originally purchased CS2.
Is Adobe CS2 Actually Free to Download? What You Need to Know adobe cs2 free download
(no longer promoted on their main site) used to provide these files. You can find them via the Wayback Machine or direct Adobe static links, but here is the legitimate disclosure you must include if you're writing text for a download page or article: Adobe officially made CS2 available for free around
In January 2013, Adobe disabled the aging activation servers for Creative Suite 2 and Acrobat 7. To ensure that could still reinstall their software, Adobe provided a special version of the installer that did not require online activation, alongside a generic serial number. What You Need to Know (no longer promoted