Fairmat : A derivative and capital investments modelling tool.

Fairmat is a derivative and capital investments modelling tool. It permits you to build a pricing model for many financial projects (or derivative contracts) using a graphical representation blended with a high level algebraic language. It is also possible to use it to evaluate projects and perform real options valuations. The platform can be extended using a plug-in system.

• Licenses : Freeware for non commercial use
• Operating Systems : Windows, Mac OS X, Linux
• Implementation : C#

Mixxx : Free mixing software for DJs, providing everything needed to create live mixes

Mixxx is free mixing software for DJs, providing everything needed to create live mixes. It allows you to beatmatch songs and crossfade them together, like you would with turntables and a mixer.

TexLexAn allows you to drag and drop a document or a link to any Web page to analyze

TexLexAn allows you to drag and drop a document or a link to any Web page to analyze. The program will analyze the text, evaluate its readability, categorize the document, summarize it, and archive it.

• Licenses : GPL
• Operating Systems : Linux, FreeBSD
• Implementation : C, Python, PyGTK

NetXMS : A monitoring system with a modular architecture

NetXMS is a monitoring system with a modular architecture. It can be used for monitoring an entire IT infrastructure, starting with SNMP-capable hardware (like switches and routers) and ending with applications on servers. The system has a three-tier architecture; the information is collected by monitoring agents (either its own agents or SNMP agents) and delivered to the monitoring server for processing and storing, where it can be accessed by using the management console. It features centralized configuration and centralized agent upgrades.

• Licenses : GPL
• Operating Systems : POSIX, Windows, Windows CE
• Implementation : C++

ntop : A network probe that shows network usage in a way similar to what top does for processes

ntop is a network probe that shows network usage in a way similar to what top does for processes. It acts as a Web server, creating an HTML dump of the network status. It sports a NetFlow/sFlow emitter/collector, an HTTP-based client interface for creating ntop-centric monitoring applications, and RRD for persistently storing traffic statistics.

• Licenses : GPL
• Operating Systems : Windows, POSIX, Linux

gscan2pdf : A GUI to ease the process of producing PDFs from scanned documents

gscan2pdf is a GUI to ease the process of producing PDFs from scanned documents. You scan in one or several pages and create a PDF of selected pages. Scanning is handled with SANE via scanimage. PDF conversion is done by PDF::API2. Perl is used for portability and ease of programming, with gtk2-perl for the GUI.

• Licenses : GPL
• Operating Systems : POSIX
• Implementation : Perl

Dkopp : A program for copying or backing up disk files to DVD or BD (Blu-ray)

Dkopp is a program for copying or backing up disk files to DVD or BD (Blu-ray). Full or incremental backups can be made, with full or incremental media verification. Dkopp uses a GUI to navigate through directories to select or de-select files or directories at any level. Backup jobs can be saved for recurring use. New, deleted, and updated files are handled automatically, without re-editing the backup job. An incremental backup updates the same media used for a prior full backup. A GUI restore function is also provided. Differences between disk and DVD/BD can be reported in total, by directory and by file.

• Licenses : GPLv3
• Operating Systems : Linux
• Implementation : C++

FreeRADIUS : A high-performance, highly configurable, and feature-rich RADIUS server

FreeRADIUS is a high-performance, highly configurable, and feature-rich RADIUS server. Supported features include EAP (wireless authentication, PEAP, TTLS), MySQL, PostgreSQL, Oracle, LDAP, X9.9 token cards, VMPS, and many more. It comes with more than 50 vendor dictionaries, and interoperates with many others. It is the only open source RADIUS server that has implemented EAP, and it is currently deployed in multiple million-user systems.

• Licenses : GPL
• Operating Systems : POSIX, Windows, Cygwin, Unix
• Implementation : C

Likewise Open : joins Linux, Unix, & Mac OS machines to Microsoft Active Directory and securely authenticates users with their domain credentiials

Likewise Open is an application that joins Linux, Unix, and Mac OS machines to Microsoft Active Directory and securely authenticates users with their domain credentials. Features include: joining non-Windows systems to Active Directory domains in a single step from the command line or from a GUI; authenticating users with a single user name and password; enforcing the same password policies for all platforms; supporting multiple forests with one-way and two-way cross forest trusts; caching credentials in case your domain controller goes down; and providing single sign-on for SSH and Putty. It does not require Active Directory schema changes for installation.

• Licenses : GPL, GPLv2
• Operating Systems : Mac OS X, Windows, Unix

Instantbird : A multi-protocol instant messaging client

Instantbird is a multi-protocol instant messaging client. Using it, you can connect to all your different IM accounts. It uses the Mozilla rendering engine to display messages, and uses the Pidgin libpurple to connect to the different networks.

• Implementation : C++

RRDtool : The OpenSource industry standard, high performance data logging and graphing system for time series data

RRDtool is the OpenSource industry standard, high performance data logging and graphing system for time series data. Use it to write your custom monitoring shell scripts or create whole applications using its Perl, Python, Ruby, TCL or PHP bindings.

GNU SIP Witch : A secure peer-to-peer VoIP server

GNU SIP Witch is a secure peer-to-peer VoIP server. Calls can be made even behind NAT firewalls, and without requiring service providers. SIP Witch can be used on the desktop to create bottom-up secure calling networks and as a free software alternative to Skype. It can also be used as a stand-alone SIP-based office telephone server, or to create secure VoIP networks for an existing IP-PBX such as Asterisk, FreeSWITCH, or Yate.

• Licenses : GPLv3
• Operating Systems : OS Independent
• Implementation : C++

check_ssl_cert : A Nagios plugin to check X.509 certificates

check_ssl_cert is a Nagios plugin to check X.509 certificates. It checks if the server is running and delivers a valid certificate. It also checks if the CA matches a given pattern, and checks the validity.

• Licenses : GPLv2
• Operating Systems : Mac OS X, Unix
• Implementation : Unix Shell, bash

zlib : Designed to be a free, general-purpose, legally unencumbered, lossless data-compression library for use on virtually any computer hardware

zlib is designed to be a free, general-purpose, legally unencumbered, lossless data-compression library for use on virtually any computer hardware and operating system. The zlib data format is itself portable across platforms. Unlike the LZW compression method used in Unix compress(1), the compression method currently used in zlib essentially never expands the data. (LZW can double or triple the file size in extreme cases.) zlib's memory footprint is also independent of the input data and can be reduced, if necessary, at some cost in compression.

• Licenses : zlib/libpng
• Operating Systems : OS Independent
• Implementation : C

Mausezahn : A fast traffic generator which allows you to send nearly every possible and impossible packet

Mausezahn is a fast traffic generator which allows you to send nearly every possible and impossible packet. Mausezahn can be used, for example, as a traffic generator to stress multicast networks, for penetration testing of firewalls and IDS, for simulating DoS attacks on networks, to find bugs in network software or appliances, for reconnaissance attacks using ping sweeps and port scans, or to test network behavior under strange circumstances. Mausezahn gives you full control over the network interface card and allows you to send any byte stream you want (even violating Ethernet rules).

• Operating Systems : POSIX Linux
• Implementation : C

ip2clue provides access to multiple databases to retrieve country information associated with IP addresses

ip2clue provides access to multiple databases (Maxmind, Software 77, Webhosting.info and ip2location) to retrieve country information associated with IP addresses. It has a daemon that supports lots of concurrent connections and a client binary. Some client examples are also provided in languages including PHP and C.

• Licenses : GPLv3
• Operating Systems : Linux
• Implementation : C, PHP

MultiVNC : A cross-platform, Multicast-enabled VNC viewer

MultiVNC is a cross-platform, Multicast-enabled VNC viewer. Features include support for most encodings, ZeroConf service discovery, a seamless edge control mode á la x2vnc, and most prominently, experimental support for VNC via multicast.

• Licenses : GPLv2
• Operating Systems : Unix, Linux, Windows, Mac OS X
• Implementation : C++, libvncclient, wxWidgets

Spicebird : An email and messaging software

Spicebird is an email and messaging software. It provides email, calendaring, and instant messaging and can connect to any standards based server. It is built with an innovative tabbed user interface and high end functionality.

• Licenses : GPL
• Operating Systems : Windows, POSIX, Linux

Automatic Drawing Generation : GObject-based library

Automatic Drawing Generation is GObject-based library that provides a non-interactive Cairo canvas specifically designed for generating technical drawings.

• Licenses : LGPL
• Operating Systems : Mac OS X, Windows, Linux, Unix, FreeBSD, OpenSolaris
• Implementation : C

WhatWeb fingerprints Web servers and Web applications

WhatWeb fingerprints Web servers and Web applications. It can identify content management systems (CMS), Web application frameworks, default pages for Web servers, blogs, JavaScript libraries, and more. Each time you visit a Web site in your browser, the Web server leaks many hints about the software delivering the Web page. WhatWeb recognizes these hints and reports what it finds. WhatWeb has over 70 plugins. Plugins can identify systems with obvious signs removed by looking for subtle clues. Plugins are flexible and can return any datatype. For example, plugins can return version numbers, email addresses, account IDs, and more.

• Licenses : GPLv2
• Operating Systems : Linux
• Implementation : Ruby