SAI or Easy Paint Tool SAI (ペイントツールSAI) is a lightweight raster graphics editor and painting software for Microsoft Windows
developed and published by SYSTEMAX Software. Development of the
software began on August 2, 2004, and the first alpha version was
released on October 13, 2006. SAI's official release (1.0.0) was on
February 25, 2008, and an update preview was released shortly after. The
software's current revision, 1.1.0 was released in 2008. SYSTEMAX has
published betas of the next revision, the latest of which is 1.2.0 Beta 5
released in 2013.
The painting application is available in both Japanese, and an official English translation. An unofficial fanmade translation for the software also exists. It can be purchased directly through the developers' website, and purchases through PayPal are now also accepted in addition to the BitCash and TelecomCredit payment systems that have been available for Japanese users.
Paint Tool SAI is available on Microsoft Windows 98, Me, 2000, XP, Vista, 7 and 8.
For more details: http://en.wikipedia.org/wiki/SAI_%28software%29
Download: http://www.mediafire.com/download/j52zgs86llpvk7d/PaintTool+SAI+English+Pack.zip