Abbrevia is also one of the good old TurboPower components like Orpheus. It is also hosted at SourceForge and it is maintained by Craig Peterson, one of the Beyond Compare developers. You can read at SourceForge the following:
“Abbrevia is a compression toolkit for Delphi, C++Builder, Kylix, and Free Pascal.
It supports compressing and decompressing PKZIP, Microsoft CAB, tar, gzip, and bzip2 archives, and can create self-extracting executables. On Windows it also provides Delphi wrappers for the LZMA, Bzip2, and WavPack SDKs, and PPMd decompression.
Abbrevia also has several visual controls that simplify displaying and manipulating archives, including treeview and listview components.”
Abbrevia now also supports XE4.