Ganymed SSH-2 for Java is a library that implements the SSH-2 protocol in pure Java (tested on J2SE 1.4.2, 5, and 6). It allows one to connect to SSH servers from within Java programs. It supports SSH sessions (remote command execution and shell access), local and remote port forwarding, local stream forwarding, X11 forwarding, SCP, and SFTP. There are no dependencies on any JCE provider, as all cryptographic functionality is included.
Jarmor (Java ASCII Armor) is a tiny collection of stream filters which implement ASCII armors. They can be used to convert streams of binary data into text and vice-versa. For example, it can be used to transfer or store data using text-only means like mail or XML. The supported encodings are Base64, Base32, Base16, UUCP, and ASCII85.
YProlog is a pocket Prolog engine written in 100% Java. It provides a number of fast and easy Java-Prolog interfacing functions that enables the Prolog database to be used like an SQL-type database. It has fast consult and retract operations, can "serialize" database contents into text, and can easily load and store tables or contents of Java objects. It is based on Jean Vaucher's XProlog.
MARF is a general cross-platform framework with a collection of algorithms for audio (voice, speech, and sound) and natural language text analysis and recognition, along with sample applications (identification, NLP, etc.) of its use. MARF can run distributed over the network (CORBA, Java RMI, and Java XML-RPC Web Services) and may act as a library in applications or be used as a source for learning and extension.
Nux is a Java toolkit that makes efficient and powerful XML processing easy. It is geared towards embedded use in high-throughput XML messaging middleware such as large-scale peer-to-peer infrastructures, message queues, publish-subscribe, and matchmaking systems. It provides a robust commodity Java tool set for XML, XQuery, XPath, schema validation, binary XML, fuzzy fulltext similarity search, and related technologies. Nux allows you to mix and match powerful main-memory XML tools that fit your needs.
cache4j is a cache for Java objects with a simple API and fast implementation. It features in-memory caching, a design for a multi-threaded environment, both synchronized and blocking implementations, a choice of eviction algorithms (LFU, LRU, FIFO), and the choice of either hard or soft references for object storage.
jBCrypt is a Java implementation of OpenBSD's Blowfish password hashing code, as described in "A Future-Adaptable Password Scheme" by Niels Provos and David Mazières. This system hashes passwords using a version of Bruce Schneier's Blowfish block cipher, with modifications designed to raise the cost of off-line password cracking and frustrate fast hardware implementation. The computation cost of the algorithm is parametised, so it can be increased as computers get faster. The intent is to make a compromise of a password database less likely to result in an attacker gaining knowledge of the plaintext passwords.