Archive is a fully drag-and-drop multi-format archiver. Drag a directory onto it to create an archive. Drag an archive onto it to extract to a directory. It can also compress and decompress streams (for example, you could drag a .gz file onto Archive and from Archive into your text editor).
sdelta analyzes two files and outputs the difference. It applies the difference to the first of the original files to construct a bit for bit clone of the second file. It is optimized for use with source tarballs, and also contains sdreq, the client for the Public Patch Repository, PPR. The PPR generates on demand source upgrade and downgrade patches for over a quarter of a million version specific source tarballs. By using sdreq you can acquire new source tarballs from the PPR several times faster and with only 10% of the downloading that you currently do.
The URARFileLib is a small static library that allows you to read files from RAR archives created with RAR and WinRAR. Listing, decompression, and decryption with full RAR 2.0 compatibility is done directly in your application, so there is no need for a DLL or any other external file. It is based on the free unRAR source code by Eugene Roshal, and designed for easy but powerful usage in demos and intros. It is also useful if you want to port your programs since the it is written in pure ANSI C (some parts are optimized in assembly) and supports multiple operating systems.
RAR is a general purpose archiving and compression program competing with/replacing programs such as PKZip, ARJ and others. RAR offers significantly improved compression ratios, easier use and a better price as well as supporting long file names, disk spanning and self-extracting file creation. RAR introduces an original compression algorithm. It allows higher compression ratios than other PC archiving tools, especially on executable files, Object libraries, large text files, etc.