A native Windows port of the GNU Compiler Collection (GCC)
MinGW: A native Windows port of the GNU Compiler Collection (GCC), with freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All of MinGW's software will execute on the 64bit Windows platforms.
A lightweight and easy-to-use password manager
KeePass Password Safe is a free, open source, lightweight, and easy-to-use password manager for Windows, Linux and Mac OS X, with ports for Android, iPhone/iPad and other mobile devices. With so many passwords to remember and the need to vary passwords to protect your valuable data, it’s nice to have KeePass to manage your passwords in a secure way. KeePass puts all your passwords in a highly encrypted database and locks them with one master key or a key file. As a result, you only have to remember one single master password or select the key file to unlock the whole database. And the databases are encrypted using the best and most secure encryption algorithms currently known, AES and Twofish. See our features page for details.
Anti-Spam SMTP Proxy Server implements multiple spam filters
The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods. Click 'Files' to download the professional version 2.6.1 build 17355. An linux and a freeBSD based OVA of ASSP V2 are also available for download. NOTICE: V1 development has been stopped at the end of 2014 (1.10.1 build 16060). Possibly there will be done some bugfixing in future. Please upgrade to V2, which is and will be actively maintained.
Free FTP and SFTP client for Windows
WinSCP is a free SFTP and FTP client for Windows, and a multi-functional tool that improves your productivity. WinSCP copies files between and remote computers using multiple protocols: FTP, FTPS, SCP, SFTP, or WebDAV. And WinSCP offers an intuitive interface. You can also automate WinSCP functionality using .NET assembly or simple batch file scripting. Use WinSCP for common operations with files and edit files directly from WinSCP using WinSCP internal text editor, or by integrating with an external text editor. WinSCP operations are not limited to individual files; WinSCP offers several ways to synchronize your remote and local directories. After connecting to a site, store site information for easy access. WinSCP integrates with Pageant (PuTTY authentication agent) for full support of public key authentication with SSH. Admins love WinSCP support for portable operation using a configuration file instead of registry entries, suitable for operation from removable media.
A disk usage statistics viewer and cleanup tool for Windows
WinDirStat (Windows Directory Statistics) is a disk usage statistics viewer and cleanup tool for Windows. On start up, WinDirStat reads the whole directory tree once and then presents it in three useful views: - The directory list, which resembles the tree view of the Windows Explorer but is sorted by file/subtree size, - The treemap, which shows the whole contents of the directory tree straight away, - The extension list, which serves as a legend and shows statistics about the file types. Visit the WinDirStat blog for more up-to-date information about the program. Note: If you are looking for an alternative to WinDirStat for Linux, then you are looking for KDirStat (apt-get install kdirstat on Debian-derivatives), and the alternative to WinDirStat for MacOS X is Disk Inventory X or GrandPerspective.
A video capture utility for 32-bit and 64-bit Windows platforms
Do you need quick capture and encoding capabilities for video on your desktop? VirtualDub is a free, Open Source solution specifically designed for that purpose. VirtualDub might lack the editing power of a general-purpose editor such as Adobe Premiere, but is streamlined for fast linear operations over video in return. It has batch-processing capabilities for processing large numbers of files and can be extended with third-party video filters.
Powerfull download accelerator and video downloader
Xtreme Download Manager is a powerful tool to increase download speed up-to 500%, save and convert streaming videos from YouTube, Vimeo, Dailymotion, Google Video and thousands of other websites, resume broken/dead downloads and schedule downloads. XDM seamlessly integrates with Google Chrome, Mozilla Firefox Quantum, Opera, Vivaldi and many popular browsers, to take over downloads and saving streaming videos from web. XDM has built in video converter which lets you convert downloaded videos to popular MP4 and MP3 formats. Support for HTTP, HTTPS, FTP, DASH, HLS, HDS protocols, firewalls, proxy servers, PAC scripts, file redirects, cookies, authorization, download queue, scheduler and many more feature makes XDM a very useful tool
An extremely powerful and configurable BitTorrent client
Vuze (formerly Azureus) is an extremely powerful and configurable BitTorrent client. Search and download torrent files. Play, convert and transcode videos and music for playing on many devices such as PSP, TiVo, XBox, PS3, iTunes (iPhone, iPod, Apple TV).
Free 32/64/16-bit multi-platform Pascal and Object Pascal compiler
A 32/64/16-bit Pascal compiler for Win32/64/CE, Linux, Mac OS X/iOS, FreeBSD, OS/2, Game Boy Advance, Nintendo NDS and DOS; semantically compatible with Delphi, Borland Pascal and Mac Pascal (partially) with extra features, e.g. operator overloading.
Antivirus software with virus scanning and virus definition updates
Looking for free Open Source Antivirus for Windows? Download ClamWin Free Antivirus and get free virus scanning and free virus definition updates. Free Antivirus software for Windows, using the well-respected ClamAV scanning engine. Includes virus scanner, scheduler, virus database updates, context menu integration to MS Windows Explorer and Add-in to MS Outlook. Also features easy setup program.
A planetarium software that shows a 3D simulation of the night sky
Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets, nebulae and others things like ground, landscape, atmosphere, etc.
A free utility that finds malware and other threats
-- WARNING -- HiJackThis is an inactive project and it is not updated anymore. You may want to look at the existent unofficial forks though: https://github.com/dragokas/hijackthis/ -- HijackThis is a free utility that generates an in depth report of registry and file settings from your computer. HijackThis scan results make no separation between safe and unsafe settings , which gives you the ability to selectively remove items from your machine. In addition to scan and remove capabilities, HijackThis comes with several useful tools to manually remove malware from your computer. However, HijackThis does not make value based calls between what is considered good or bad. It is important to exercise caution and avoid making changes to your computer settings, unless you have expert knowledge. Source code is available SourceForge, under Code and also as a zip file under Files.
Streams many media formats with minimal configuration
Universal Media Server is a DLNA-compliant UPnP Media Server Universal Media Server supports all major operating systems, with versions for Windows, Linux and Mac OS X. The program streams or transcodes many different media formats with little or no configuration. UMS is powered by MEncoder, FFmpeg, tsMuxeR, AviSynth, MediaInfo and more, which combine to offer support for a wide range of media formats Check out the list of media renderers here: http://www.universalmediaserver.com/about/
A CPU miner for Litecoin, Bitcoin, and other cryptocurrencies
cpuminer is a multi-threaded, highly optimized CPU miner for Litecoin, Bitcoin, and other cryptocurrencies. Currently supported algorithms are SHA-256d and scrypt(N, 1, 1). It supports the getblocktemplate mining protocol as well as the Stratum mining protocol, and can be used for both solo and pooled mining. Notice: Please see here to understand why this package is recognized as a threat by some antivirus software: https://github.com/pooler/cpuminer/issues/13
Disk Inspection and Monitoring
smartmontools contains utility programs (smartctl, smartd) to control/monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (S.M.A.R.T.) built into most modern ATA and SCSI disks. It is derived from smartsuite.
x264vfw is the VfW (Video for Windows) version of well known x264 encoder + ffh264 decoder (from FFmpeg/Libav project).
Windows LDAP editor, includes support for POSIX groups and accounts, SAMBA accounts, some Postfix objects and more
Versatile Commodore Emulator
VICE is an emulator collection which emulates the C64, the C64-DTV, the C128, the VIC20, practically all PET models, the PLUS4 and the CBM-II (aka C610). It runs on Unix, MS-DOS, Win32, OS/2, Acorn RISC OS, BeOS, QNX 6.x, Amiga, GP2X or Mac OS X machines.
Open Source Monitoring System for performance and availability.
Pandora FMS is an enterprise-ready monitoring solution that provides unparalleled flexibility for IT to address both immediate and unforeseen operational issues, including infrastructure and IT processes. It uniquely enables business and IT to adapt to changing needs through a flexible and rapid approach to IT and business deployment. Pandora FMS consolidates all the needs of modern monitoring (ITOM, APM, BAM) and provides status and performance metrics from different operating systems, virtual infrastructure (VMware, Hyper-V, XEN), Docker containers, applications, storage and hardware devices such as firewalls, proxies, databases, web servers or routers. It's highly scalable (up to 2000 nodes with one single server), 100% web and with multi-tenant capabilities. It has a very flexible ACL system and several different graphical reports and user-defined control screens.
SAGA - System for Automated Geoscientific Analyses - is a Geographic Information System (GIS) software with immense capabilities for geodata processing and analysis. SAGA is programmed in the object oriented C++ language and supports the implementation of new functions with a very effective Application Programming Interface (API). Functions are organised as modules in framework independent Module Libraries and can be accessed via SAGA’s Graphical User Interface (GUI) or various scripting environments (shell scripts, Python, R, ...). Please provide the following reference in your work if you are using SAGA: Conrad, O., Bechtel, B., Bock, M., Dietrich, H., Fischer, E., Gerlitz, L., Wehberg, J., Wichmann, V., and Boehner, J. (2015): System for Automated Geoscientific Analyses (SAGA) v. 2.1.4. Geosci. Model Dev., 8, 1991-2007, doi:10.5194/gmd-8-1991-2015. http://www.geosci-model-dev.net/8/1991/2015/gmd-8-1991-2015.html.
Excel VBA Script to convert VCF file with multiple entries to CSV file
This is an Excel based VBA script used to import bulk .VCF files that contain more than 1 Vcard and then convert them to a comma separated .CSV file or Excel xls file that can then be imported into Outlook, Google, or any other application that supports import of contacts using CSV files. This has been written to support VCF 2.0, 2.1, 3.0 and 4.0 formatted files including those with printable encoding (MIME) and has been tested with bulk VCF files from Backupify, Google Contacts (Gmail Contacts), Apple IOS, Samsung Android devices and other platforms. If this doesn't work for you, please email me the VCF file and I'll modify the code to support your specific VCF format. To use, simply download and open the Excel file (xlsm), Enable Macros if prompted, and then select the VCF file you wish to import. Once complete, Excel will create and save new file titled VCFExport.csv that can also be saved in Excel format.
A free sing-along karaoke game for your PC
Karaoke sing-along game for PC which is similar to Playstation® Singstar™. It allows up to six players to sing along with music using microphones in order to score points, depending on the pitch of the voice and the rhythm of singing.
SDCC is a retargettable, optimizing standard C (ANSI C89, ISO C99, ISO C11) compiler that targets a growing list of processors including the Intel 8051, Maxim 80DS390, Zilog Z80, Z180, Rabbit 2000, gbz80, Motorola 68HC08, S08 and STMicroelectronics STM8 targets. There also is incomplete support for the Microchip PIC16 and PIC18.
Multiple desktops on a Windows box
VirtuaWin is an application for the Windows user community that misses the wonderful multiple desktop functionality often used on Unix systems. It is simple, reliable and highly configurable, supporting up to 20 virtual desktops.
Scid is a chess database application (cross-platform, for Unix/Linux and Windows) with many search and database maintenance features.