If you are looking for the latest PGP freeware version, then the following table may be of help:

		Latest version
Windows 9x/NT/2000		7.0.3
MacOS		7.0.3
Command line	Windows	7.0.3
	Unix	6.5.8
	MS-DOS	5.0i
	OS/2	5.0.i / 6.5.1i beta
	Amiga	5.0i
	Atari	5.0i
Source code		6.5.8
GnuPG		1.0.6

The latest PGP freeware versions can always be downloaded here.