DeviantArt has long been a hub for artists to share brush presets, textures, and occasionally, "cracked" versions of software. If you are looking for a free version there, you will likely find:
A license for Paint Tool Sai costs around . It is a one-time purchase—no subscriptions. Once you buy a license for Sai 1, you get Sai 2 for free forever. Given that it is a tool you might use for thousands of hours, the price-per-use is incredibly low. Conclusion Paint Tool Sai 2 Free Download Full Version Deviantart
Small programs intended to bypass the license check. The Risks: DeviantArt has long been a hub for artists
If you are tech-savvy, run the program in a "Sandbox" or a Virtual Machine to ensure it doesn't access your personal files. Why You Should Consider Buying It Paint Tool Sai 2 Free Download Full Version Deviantart