300. Nebohodimo IM
Nebohodimo is a Jabber client that works exclusively on Windows-based mobile devices. It works well when youre on the go, because its designed to stay stable even when your connection doesnt. Operating System: Windows Mobile
Used by millions, Pidgin lets you communicate with friends on 16 different IM networks, including AIM, GoogleTalk, MSN, Yahoo, and many others. Its won numerous awards, and it supports dozens of languages. Operating System: Windows, Linux/Unix, OS X.
Psi is an open-source IM client for the Jabber network, which includes GoogleTalk, LiveJournal, and a number of international networks. Its completely customizable and supports about 20 different languages. Operating System: Windows, Linux, OS X.
With more than 5,000 downloads a month, this IDS is among the world's most popular. Commercial support is available through Third Brigade. Operating System: Windows, Mac, Linux, Unix, BSD, Solaris.
As the most widely deployed intrusion prevention technology in the world, Snort has earned the right to call itself "the de facto standard for intrusion prevention/detection." It performs real-time analysis to detect buffer overflows, stealth port scans, CGI attacks, SMB probes, OS fingerprinting attempts, and other attacks. Operating System: Linux, Unix, BSD, Mac OS X.
This modified version of Snort uses iptables instead of libpcap. Operating System: FreeBSD, Linux.
GLPI tracks your IT resources with a database that inventories all of your hardware and software. In addition, it includes a job management function that allows users to report problems and administrators to track progress. Operating System: OS Independent. 307. OCS Inventory NG
Having an up-to-date list of the hardware and software on your network can be invaluable for security planning. This handy app simplifies inventory management and deployment of new technology. Operating System: OS Independent.
Need to leave your laptop unattended for a moment? Plug your laptop into an A/C outlet and then lock it. If someone removes it from the power source, A.L.A.R.M. will play a loud noisesort of like a burglar alarm for your laptop. Operating System: Windows.
Worried about your MacBook getting stolen? When iAlertU senses sudden motion, it sets off an alarm, and it even takes a picture of the thief and e-mails it to you. (Note: You'll need to scroll down on the home page to find the iAlertU download.) Operating System: OS X.
Like A.L.A.R.M.(above) this app sounds an alarm when someone tries to swipe your laptop. Only in this case, it detects any motion instead of removal of the A/C power source. Note that it only works with ThinkPad systems. Operating System: Windows.
OpenBiblio is an automated library system that includes a public catalog, circulation, and administration features. It works with any scanners that can display a barcode as keyboard input, and a list of scanners known to work with the system is available on the site. Operating System: OS Independent.
Designed by libraries for libraries, VuFind replaces the traditional online public access catalog (OPAC) with a Web 2.0 portal for searching all of your library's resources. Unique features include the ability to browse all resources, faceted results to search queries, a "more like this" link for searches, and the ability to text yourself a call number so you don't have to write it down on a little slip of paper. Operating System: OS Independent.
With AWStats, you can generate graphical representations of Web, streaming, ftp, or mail server statistics. As a result, you can see at a glance what kind and how many attacks have been directed at your network without slogging through pages of data. Operating System: Windows, Mac, Linux, Unix.
BASE, short for "Basic Analysis and Security Engine," provides a front-end to analyze alerts from Snort IDS. It's easy to use and includes role-based user authentication. Operating System: OS Independent.
Wondering what your Netfilter-based firewall has been doing all day? This app helps you make sense of all the data tracked by your logs. Operating System: Linux.
Short for "System iNtrusion Analysis and Reporting Environment," Snare collects and analyzes event log data. Multiple versions are available, including the commercial Snare server. Operating System: Windows, Mac, Linux, Unix, BSD, Solaris.
Splunk not only monitors log files, it analyzes what's happening, making it easier to follow the trail of a hacker and respond to threats. Plus, it can analyze other types of IT data (message alerts, performance data, etc.) as well as security-related files. Operating System: Windows, Mac, Linux, BSD, Solaris, AIX.
This app lets you build an "argument map": a visual representation of the structure of an argument. It's helpful for students studying critical reasoning, logic, debate, philosophy, and persuasive writing, as well as lawyers and law students. Operating System: Windows.
With Apophysis, you can create or edit fractal flames. Fractal flames, of course, are algorithmically generated images. No, they arent really good for anything, but theyre interesting to look at, and math buffs love them. Operating System: Windows
Multiple-award-winning GeoGebra creates dynamic models useful for learning about geometry, arithmetic, algebra, and calculus. In addition to the downloadable version, you can also use the applet version while you're online. At the site, you'll also find extensive wikis, worksheets, and other help for math teachers. Operating System: OS Independent.
Gnuplot creates both 2D and 3D graphs to make it easier to visualize mathematical functions or scientific data. Graphs can be saved or exported in numerous file formats or sent directly to your printer. Operating System: Windows, Linux, Unix, OS X, and others.
Why buy a graphing calculator when you can run GraphCalc for free on your PC? It's at least as easy to use as a standalone graphing calculator and it creates graphs in both 2D and 3D. Operating System: Windows.
This computer algebra system solves equations and plots data and functions in both 2D and 3D. The Maxima Web site also includes a handy list of links to other open-source computer algebra software. Operating System: Windows, Linux, OS X.
TTCalc is a scientific calculator that lets you use really big numbers. Features include arithmetical functions, trigonometric and inverse trigonometric functions, hyperbolic and inverse hyperbolic functions, logical operators, logarithms, and more. Operating System: Windows.
Great for brainstorming, keeping track of projects, or organizing research, FreeMind lets you incorporate text, symbols, arrows, and multiple colors in a document as if you were doodling on a white board or a scratch pad. It's such a unique piece of software that you really have to try it to understand what it can do. Operating System: Windows, Linux, OS X.
Do you use a lot of special characters in your documents or do you translate to different languages frequently? AllChars lets you add accent marks, copyright marks, and other special characters with a couple of easy-to-remember keystrokes. Operating System: Windows
Elementary school and foreign language instructors often find that a game of Bingo breaks up the monotony of learning new vocabulary words. This app makes it easy to generate random cards from a set of images. Operating System: OS Independent.
MisterHouse home automation system interfaces with a variety of hardware to control virtually anything in your house, provided, of course, that you have all the substantial prerequisite hardware installed on your thermostat, lighting, curtains, television, phones, etc. It accepts voice input, so you can say MisterHouse please turn on the air conditioning, and MisterHouse will turn on the air conditioning. Operating System: Windows, Linux, OS X.
Motion is a software-based motion detector. It monitors video feeds from one or more cameras and sends an alert when the picture changes. Operating System: Linux.
Dont want to take the time to download lots of individual open-source programs? OpenDisc combines a couple dozen of the most popular open-source apps for Windows (including many of those on our list) into a single download. For a fee, you can also receive OpenDisc on a disk. Operating System: Windows
331. Sweet Home 3D
Feeling the need to redecorate after spending too much time watching HGTV? Sweet Home 3D lets you create a 2D floorplan of your room and then see what it will look like in 3D. Operating System: Windows, Linux, OS X, Solaris.
Like PortableApps.com (see below) Democrakey lets you take popular open source apps with you on a disk or thumb drive. Unlike PortableApps.com, Democrakey was specifically designed to protect your identity while you're using systems other than your own. The Minimal version includes Tor, ClamWin, Thunderbird, and TrueCrypt, while the full version adds AbiWord (word processing) and Gimp (image editing). Operating System: Windows
Downloaded more than 100 million times, this is truly one of the most popular open-source projects. It includes dozens of the most popular freeware and open-source apps, including several which also appear on our list, like 7 zip, ClamWin, Eraser, FileZilla, Firefox, KeePass, PeaZip, Thunderbird, and WinSCP. Operating System: Windows.
334. Data Crow
Do you have a huge collection of books, music, movies, software, or anything else? Are friends always borrowing your stuff and conveniently forgetting to return it? Data Crow makes it easy to set up a catalog of what you have and who borrowed it. It also connects to online services like Amazon.com and Imdb.com to provide information about your media collection. Operating System: OS Independent
InfraRecorder is a Windows-only application for burning CDs and DVDs. It supports dual-layer DVDs, as well as multiple file formats, including WAV, WMA, OGG, MP3, and ISO. Operating System: Windows
MediaInfo finds tags and technical data for audio and video files, as well as some text files. It supplies the title, artist, director, number of tracks, and much, much more. Operating System: Windows, Linux, OS X, and others.
MediaPortal aims to turn your PC or TV into a complete media center. It combines DVR capabilities with a radio tuner, audio player, video player, and more. Operating System: Windows
Need to convert an audio or video file to a different type of file format? MMConvert will do the job for you. Supported file types include asf, wmv, wma, avi, mp3, wav, mkv, mka, and ogg. Operating System: Windows
Its name is short for movie player, but Mplayer actually plays audio as well as video files. It supports a staggering number of file types, drivers, and languages, and it has an impressive list of awards to its credit. Operating system: Linux
340. VLC Media Player
Downloaded by tens of millions of users, VLC Media Player's outstanding feature is its flexibility. It can play nearly every audio and video format, and you can even use it to stream video from your own server. Operating System: Windows, Linux, Mac, BSD, Solaris.
341. XBMC Media Player
Winner of multiple awards, XBMC plays virtually any type of video, audio, or photo file, as well as organizing media files with its library management system. The controls are intuitive and the overall look is very visually appealing. Operating System: Windows, Linux, OS X, and others.
Xine plays CDs, DVDs, and VCDs, as well as decoding and playing most types of audio and video files. Operating System: OS X, Linux, FreeBSD, and Solaris.
343. Bastille Linux
Because it does such an excellent job educating users about security issues as it takes steps to harden their systems, many organizations use Bastille Linux to train new systems administrators as well as to harden systems against attack. The app walks users through a series of questions about their security needs, helps them make informed decisions, and then applies the necessary changes to the system. Operating System: Linux, Unix, OS X.
Combining Wireshark, Nessus, Snort, Nmap, Ntop, Kismet, and many other well-known open-source security apps, NST aims to provide network security administrators with a comprehensive set of security tools. It provides network traffic analysis, intrusion detection, network packet generation, wireless network monitoring, and a host of other functions. Operating System: OS Independent.
Short for "Open Source Security Information Management," OSSIM combines 12 separate open source security tools, including Snort, Nessus, Nagios, and others. The dual goals are to prevent intrusions and give administrators a complete, detailed view of the entire network. Operating System: Windows, Mac, Linux, Unix, BSD, Solaris.
This app gives you control over a number of system settings and settings for Windows Media Player, Internet Explorer, and Firefox. A handy tooltip feature lets you know what each function does and why you might want to enable or disable it. Operating System: Windows.
If you're trying to transcribe, orchestrate, or just learn how to play a particular piece, it can be really helpful to be able to slow down a recording. But slowing down a recording usually changes the pitch. BestPractice lets musicians slow down CD tracks or MP3s without lowering the pitch of the music. Operating System: Windows.
348. GNU Solfege
Wish you had perfect pitch? GNU Solfege is an ear-training application that teaches students to identify and sing intervals, recognize rhythms patterns, sing scales and chords, and identify harmonic progressions. Operating System: Windows, Linux, OS X.
LenMus combines a bunch of useful tools for learning music into a single download. It includes ear training activities, music theory exercises, and a score editor so you can write your own compositions. Operating System: Windows, Linux, OS X.
Like many of the other apps in this category, Devil-Linux was originally intended to be used to turn an old PC into a firewall/router. Now the program has been updated so that it can also be used as an application server. Operating System: Linux.