apLib

apLib is a liteweight and fast compression library supporting several programming languages; it's freeware/opensource and crossplatform (DOS / Windows - BeOS - FreeBSD - Linux - OS/2 - QNX); it features a good balance between speed, compression ratio and the size increment of your application (tiny footprint of the depackers). In Delphi you can use the precompiled OBJs or link to the wrapper aplib.dll. I packaged the Delphi side of the library in a well organized set of subfolders.

http://cid-a4be6bd07411a607.skydrive.live....Delphi/apLib.7z