pkgin is aimed at being an apt / yum like tool for managing pkgsrc binary packages. It relies on pkg_summary(5) for installation, removal and upgrade of packages and associated dependencies, using a remote repository.
dedup util is a lightweight open-source files packing tool. It is based on block-level data de-duplication technology, and can reduce the data capacity to save storage space. The key feature is no block data collsion with md5 hashkey.
ReHash is an easy-to-use console-based hash calculation tool written in C++. It supports many algorithms and output formats and it can be fully configured using some of the many command-line arguments which can be passed to the tool.