Release Notes: GPL licensing, a ton of bug fixes, some code cleanup, more projections (a total of 121), and NVIZ tools for 3d visualisation.
Release Notes: Many bugfixes, NVIZ 2.2 (a visualization tool), and an Xdriver which supports 24 bit depth.
Release Notes: Bugfixes over first beta. Now using autoconf. New tool programs and updates Tcl/TK Gui frontend.
Release Notes: GRASS 5.0beta represents the first major change in GRASS functionality in several years, with the most notable change being support for floating point and null values. GRASS also now has a new and much easier to use windows interface based on Tcl/Tk.