A MS-Windows native binary of the current 6.3.0 Release Candidate 1 is now available at:
https://geog-pc40.ulb.ac.be/grass/wingrass/wingrass63RC1.zip
Read the README for installation, known issues and other information. This version no longer requires a n installation of Cygwin.
The QGIS team announces the release of QGIS 0.9.0 (the package for MS-Windows contains GRASS 6.3.0RC1). The QGIS team offers also packages for Linux and MacOSX.