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Koloboke aims to replace the standard Java collections and streams with more efficient implementations. The current version of Koloboke focuses on replacing java.util.HashSet and java.util.HashMap. It provides a complete set of primitive type implementations for each collection. Its able to avoid the expensive boxing/unboxing of primitives and saves memory for boxed primitive objects. It is the fastest and the most memory efficient library implementing hash maps and sets.
Rabbit and lot more cryptographic algorithms.
Development of this project has been moved to https://github.com/jessek/hashdeep. This site has been left for historical purposes ONLY. Please visit the GitHub site for current development. Computes the MD5, SHA-1, SHA-256, Tiger, or Whirlpool message digest for any number of files while optionally recursively digging through the directory structure. Can also match input files against lists of known hashes in a variety of formats.
The Google Guava Libraries are a nice set of Java utility classes that will probably come in handy in any project. It provides immutable collections, string manipulation, handling primitives ,easier I/O, concurrency etc. it absolutely follows the Collections API requirements. It has support for murmur hash.
pyhash is a python non-cryptographic hash library. It provide several common hash algorithms with C/C++ implementation for performance. pyhash support the following hash algorithms FNV (Fowler-Noll-Vo) hash, MurmurHash 1/2/3, lookup3, SuperFastHash.
Hypertable is based on Google's Bigtable Design, which is a proven scalable design that powers hundreds of Google services. Many of the current scalable NoSQL database offerings are based on a hash table design which means that the data they manage is not kept physically ordered. Hypertable keeps data physically sorted by a primary key and it is well suited for Analytics.