Conversion Tools: Compression

ARJ

platform: DOS, partly Linux

GZIP

platform: DOS, Linux

tnef

tnef unpacks those annoying Microsoft TNEF attachments. It is based upon Thomas Boll's original tnef.c.
platform: Linux
license: GPL

Fentun

Fentun is a program which understands Microsoft's Transport Neutral Encapsulation Format (TNEF). Register it as Netscape's helper application for "application/ms-tnef", and you will be able to extract attachments embedded in the TNEF (winmail.dat). It should be easy enough to use Fentun with other email programs as well.
platform: Linux
license: freely distributable source: FreshMeat

execab

EXE 2 CAB converter 3.1 for Win95/NT SimtelNet
platform: MS-Windows95/98

byteb

ByteBoy'99: Converts any data file to MS-Excel SimtelNet
platform: MS-Windows95/98

xl2ing

Excel2Ingres data conversion for Ingres /Excel SimtelNet
platform: MS-Windows95/98