KubOS is light weight flight RTOS and framework, brings unparalleled productivity and functionality to the flight critical MCUs of satellites.

Kubos - A real-time operating system targeting microcontrollers in space

OpenSwitch provides an abstraction of hardware devices of network switch platforms in a Linux OS environment. It uses standard open source software including an ONIE installer, and an unmodified Linux kernel based on Debian Jessie distribution. It provides an object-centric API for application development to implement custom applications using a well-defined object model, and set of programmatic APIs.
 
OPX Base software supports hardware virtualization (or simulation). Software simulation of basic hardware functionality is also provided (“white board”), and the higher layer software functionality can be developed and tested on generic PC/server hardware.

OpenSwitch provides an abstraction of hardware devices of network switch platforms in a Linux OS environment. It  uses standard open source software including an ONIE installer, and an unmodified Linux kernel based on Debian Jessie distribution. It provides an object-centric API for application development to implement custom applications using a well-defined object model, and set of programmatic APIs.

OpenSwitch - Linux-based network operating system (NOS) platform

s2n is a C99 implementation of the TLS/SSL protocols that is designed to be simple, small, fast, and with security as a priority. s2n implements SSLv3, TLS1.0, TLS1.1, and TLS1.2. For encryption, s2n supports 128-bit and 256-bit AES, in the CBC and GCM modes, 3DES, and RC4. For forward secrecy, s2n supports both DHE and ECDHE. 

s2n - an implementation of the TLS/SSL protocols from Amazon

LZ4 compression for Java, based on Yann Collet's work available at http://code.google.com/p/lz4/. This library provides access to two compression methods that both generate a valid LZ4 stream fast scan (LZ4) and high compression (LZ4 HC). The streams produced by those 2 compression algorithms use the same compression format, are very fast to decompress and can be decompressed by the same decompressor instance.

lz4-java - LZ4 compression for Java

Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules including regular expressions, statistical analysis and custom services such as URL black lists. It supports Regular expressions filtering, SPF, DKIM, DNS black list, URL black lists, Fuzzy hashes etc.
 
According to this spam score and the user's settings, Rspamd recommends an action for the MTA to apply to the message, for example, to pass, reject or add a header. Rspamd is designed to process hundreds of messages per second simultaneously, and provides a number of useful features.

Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules including regular expressions, statistical analysis and custom services such as URL black lists. It supports Regular expressions filtering, SPF, DKIM, DNS black list, URL black lists, Fuzzy hashes etc.

Rspamd  - Fast, free and open-source spam filtering system

 ReJSON is a Redis module that implements ECMA-404 The JSON Data Interchange Standard as a native data type. It allows storing, updating and fetching JSON values from Redis keys (documents). It has full support of the JSON standard. Documents are stored as binary data in a tree structure, allowing fast access to sub-elements.

ReJSON - a JSON data type for Redis

ab is a tool for benchmarking your Apache Hypertext Transfer Protocol (HTTP) server. It is designed to give you an impression of how your current Apache installation performs. This especially shows you how many requests per second your Apache installation is capable of serving.

Apache Bench - Apache HTTP server benchmarking tool

MessagePack is a binary-based efficient object serialization library. It enables to exchange structured objects between many languages like JSON. But unlike JSON, it is very fast and small. This product claims to be faster than ProtocolBuffers and JSON. It supports C/C++, Ruby, Java, Python, Perl, PHP, Haskell, Lua.

MessagePack is a binary-based efficient object serialization library. It enables to exchange structured objects between many languages like JSON. But unlike JSON, it is very fast and small.

MessagePack

SpamAssassin is a mature, widely-deployed open source project that serves as a mail filter to identify Spam. SpamAssassin uses a variety of mechanisms including header and text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases. SpamAssassin runs on a server, and filters spam before it reaches your mailbox. It is in use in both email clients and servers, on many different operating systems, filtering incoming as well as outgoing email, and implementing a very broad range of policy actions.

SpamAssassin is a mature, widely-deployed open source project that serves as a mail filter to identify Spam. SpamAssassin uses a variety of mechanisms including header and text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases. SpamAssassin runs on a server, and filters spam before it reaches your mailbox. 

Spamassasin - Intelligent Spam Filter 

Leptonica Library supports many operations that are useful on Document images, Natural images. It supports fundamental image processing operations like scaling, translation, rotation, shear, Binary and grayscale morphology, blending and lot more.


Leptonica - An open source C library for efficient image processing and image analysis operations

The Sigar API provides a portable interface for gathering system information such as System memory, swap, cpu, load average, uptime, logins, Per-process memory, cpu and lot more. This information is available in most operating systems, but each OS has their own ways providing it. SIGAR provides developers with one API to access this information regardless of the underlying platform.


SIGAR - System Information Gatherer And Reporter

This is an alternative C driver for MongoDB, with slightly different goals than the official one. 
libmongo-client is meant to be a stable (API, ABI and quality alike), clean, well documented and well tested shared library, that strives to make the most common use cases as convenient as possible. It has support for connection pooling, ReplicaSet support, with support for automatic reconnecting and discovery and lot more.

libmongo-client - An alternative C driver for MongoDB 

Dynomite, inspired by Dynamo whitepaper, is a thin, distributed dynamo layer for different storages and protocols. Dynomite is a sharding and replication layer. Dynomite can make existing non distributed datastores, such as Redis or Memcached, into a fully distributed & multi-datacenter replicating datastore.

Dynomite - Making Non-Distributed Databases, Distributed 

GoAccess is an open source real-time web log analyzer and interactive viewer that runs in a terminal on *nix systems or through your browser. It provides fast and valuable HTTP statistics for system administrators that require a visual server report on the fly. It supports nearly all web log formats (Apache, Nginx, Amazon S3, Elastic Load Balancing, CloudFront, etc) 

GoAccess - Real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through your browser

Themis is open-source high-level cryptographic services library for mobile and server platforms, providing secure messaging and secure data storage. Themis provides three important cryptographic services Secure messaging, Secure session and Secure storage. 
 
<ul>
<li>
Secure Message: a simple encrypted messaging solution for the widest scope of applications. Exchange the keys between the parties and you're good to go. Two pairs of the underlying crytosystems: ECC + ECDSA / RSA + PSS + PKCS#7. </li>
<li>
Secure Session: session-oriented, forward secrecy datagram exchange solution with better security guarantees, but more demanding infrastructure. Secure Session can perfectly function as socket encryption, session security, or (with some additional infrastructure) as a high-level messaging primitive. ECDH key agreement, ECC & AES encryption.</li>
<li>
Secure Cell: a multi-mode cryptographic container suitable for storing anything from encrypted files to database records and format-preserved strings. Secure Cell is built around AES in GCM (Token and Seal modes) and CTR (Context imprint mode).</li>
<li>
Secure Comparator: a Zero-Knowledge based cryptographic protocol for authentication and comparing secrets.</li>
</ul>

Themis is open-source high-level cryptographic services library for mobile and server platforms, providing secure messaging and secure data storage. Themis provides three important cryptographic services Secure messaging, Secure session and Secure storage. 

Themis - Crypto library for storage and messaging for ObjC, Android, C++, JS, Python, Ruby and PHP

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