Slony-I is a "master to multiple slaves" replication system with cascading and failover. Slony-I is a system designed for use at data centers and backup sites, where the normal mode of operation is that all nodes are available. 

Slony-I - Replication System for PostgreSQL

The TURN Server is a VoIP media traffic NAT traversal server and gateway. It can be used as a general-purpose network traffic TURN server and gateway, too. On-line management interface (over telnet or over HTTPS) for the TURN server is available.



coturn - Free open source implementation of TURN and STUN Server


Nachos is instructional software for teaching undergraduate, and potentially 
graduate, level operating systems courses. The assignments illustrate and explore all areas of modern operating systems, including threads and concurrency, multiprogramming, system calls, virtual memory, software-loaded TLB's, file systems, 
network protocols, remote procedure call, and distributed systems.

Nachos - Instructional Operating System

B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is a routing protocol for multi-hop ad-hoc mesh networks.

B.A.T.M.A.N. - routing protocol for multi-hop ad-hoc mesh networks

Ssphirewall is a powerfull firewall, built from scratch to give you complete control and visibility over your network. It is built with everything you would expect from a network firewall, with a simple and flexible management interface. Its features include Routing, Nat and Pat, Dhcp support, PPPoE support,   - Stateful firewall core, Flexible filtering rules, QOS and Traffic Shaping, Analytics and lot more.


Sphirewall - Opensource Firewall

XINU stands for Xinu Is Not Unix -- although it shares concepts and even names with Unix, the internal design differs completely. Xinu is a small, elegant operating system that supports dynamic process creation, dynamic memory allocation, network communication, local and remote file systems, a shell, and device-independent I/O functions. The small size makes Xinu suitable for embedded environments.

Xinu - Xinu Is Not Unix

TrueCrypt is software for establishing and maintaining an on-the-fly-encrypted volume (data storage device). On-the-fly encryption means that data is automatically encrypted right before it is saved and decrypted right after it is loaded, without any user intervention. No data stored on an encrypted volume can be read (decrypted) without using the correct password/keyfile(s) or correct encryption keys.  

TrueCrypt - Disk Encryption Software

"Julius" is a high-performance, two-pass large vocabulary continuous speech recognition (LVCSR) decoder software for speech-related researchers and developers. Based on word N-gram and context-dependent HMM, it can perform almost real-time decoding on most current PCs in 60k word dictation task. 
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Major search techniques are fully incorporated such as tree lexicon, N-gram factoring, cross-word context dependency handling, enveloped beam search, Gaussian pruning, Gaussian selection, etc. It supports Windows SAPI.

"Julius" is a high-performance, two-pass large vocabulary continuous speech recognition (LVCSR) decoder software for speech-related researchers and developers. Based on word N-gram and context-dependent HMM, it can perform almost real-time decoding on most current PCs in 60k word dictation task. 

Julius - Large Vocabulary CSR Engine

SpamTestBuddy is a simple, light-weight, multiple-input spam scoring tool. It is standalone and can be used with simple procmail rules without root access or daemons. It has built-in support for simple DNS checks including DNSBL (DNS-based blocklist) queries, and can scan headers from filters such as SpamProbe, QSF, DSPAM that you already use. It reduces both false positives and false negatives with the benefit of extra spam tests. 

SpamTestBuddy - Spam Scoring Tool

Qpopper is the most widely-used server for the POP3 protocol (this allows users to access their mail using any POP3 client). Qpopper is normally used with standard UNIX mail transfer and delivery agents such as sendmail or smail. It supports IPV6, TLS / SSL and lot more.

Qpopper - The most widely-used POP3 server for Linux

Csync2 is a cluster synchronization tool. It can be used to keep files on multiple hosts in a cluster in sync. Csync2 can handle complex setups with much more than just 2 hosts, handle file deletions and can detect conflicts. It is expedient for HA-clusters, HPC-clusters, COWs and server farms.

csync2 - cluster synchronization tool

gatling is a high performance web server for Linux. It is small, fast, Scalable. It has IPv6 support, Connection Alive, HTTP, FTP and SMB support. 

gatling - a high performance web server for Linux

thttpd is a simple, small, portable, fast, and secure HTTP server.  It also has one extremely useful feature (URL-traffic-based throttling) that no other server currently has. Plus, it supports IPv6 out of the box, no patching required. 

thttpd - tiny/turbo/throttling HTTP server

OpenSC provides a set of libraries and utilities to work with smart cards. Its main focus is on cards that support cryptographic operations and facilitate their use in security applications such as authentication, mail encryption and digital signatures. OpenSC implements the PKCS11 API so applications supporting this API (such as Mozilla Firefox and Thunderbird) can use it. On the card OpenSC implements the PKCS15 standard and aims to be compatible with every software/card that supports it.

OpenSC - Open source smart card tools and middleware. PKCS#11/MiniDriver/Tokend

LMDB is an extraordinarily fast, memory-efficient database developed for the Symas OpenLDAP Project. With memory-mapped files, it has the read performance of a pure in-memory database while retaining the persistence of standard disk-based databases. With only 32KB of object code, LMDB may seem tiny. But it’s the right 32KB. Compact and efficient are two sides of a coin; that’s part of what makes LMDB so powerful.

LMDB - Lightning Memory-mapped Database

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