Clone2fs copies an ext2/ext3 file system to another volume or an image file. Unlike dd, clone2fs does not copy the whole volume but only blocks that are actually in use. Therefore, it is usually faster. It's also faster than dump/restore, tar, or similar backup software because it accesses the source and destination volumes sequentially most of the time.
Lzip is a lossless data compressor with a user interface similar to the one of gzip or bzip2. Lzip decompresses almost as fast as gzip and compresses more than bzip2, which makes it well suited for software distribution and data archiving. Lzip is a clean implementation of the LZMA algorithm. The Lzip file format is designed for long-term data archiving. It is clean, provides very safe four factor integrity checking, and is backed by the recovery capabilities of lziprecover.
Chestnut Package Manager is a utility to handle executables and resource files in a transparent, platform independent, and relocatable way. Its concept is similar to Apple bundles and Java archives. It is implemented in Python. Chestnut makes it possible to invoke programs or obtain resources without knowledge of their absolute or relative path, making them accessible even after relocation of the package to another directory.
open-vcdiff contains an encoder and decoder for the format described in RFC 3284: "The VCDIFF Generic Differencing and Compression Data Format." Given a source file and target file, the encoder produces a compact delta file expressing the differences between the two. The decoder reconstructs the target file from the source and delta files. The package includes libraries, headers, and a command-line executable. The chief reason for developers to use open-vcdiff instead of the existing Xdelta package is that open-vcdiff has been released under the Apache license rather than GPL.
Nhopkg is a lightweight and powerful package manager system for Unix-like operating systems. Nhopkg can install, remove, update, search, and manage software packages in its own .nho format. Nhopkg aims to be a universal package manager. Because of this, Nhopkg isn't only a package manager, but is also a set of guidelines to pack up software for any machine. Therefore, to check package dependencies, Nhopkg searches for specific files instead of package names.