The Turing-Welchman Bombe was an electro-mechanical device used at Bletchley Park and its outstations during World War II to assist in breaking the Enigma cipher used by the German military.
Based on ideas from a device known as a bomba, designed in Poland by Marian Rejewski as early as 1939, the Turing-Welchman Bombe enabled Bletchley Park to find the daily keys of the Engima machine on a regular basis throughout most of the war.
The British Bombe was designed by Alan Turing with important additions by Gordon Welchman. They were built by the British Tabulating Machine Company in Letchworth, Hertfordshire.
Virtual Bombe is a 3d Turing-Welchman Bombe simulation which can run using just your browser. No install is necessary.
Enigma is the brand name of a series of cipher machines developed in Germany between 1923 and 1945.
A number of these machines were used during World War 2 by the German Army, Navy and Air Force, this website has simulations for both the three rotor Enigma I used by the Heer (Army) and Luftwaffe (Air Force) and the four rotor Enigma M4 used by the Kriegsmarine (German Navy).
The Enigma code was cracked and read initially by the Poles in 1932 with Bletchley Park continuing and expanding on this work where they regularly read the German encrypted messages throughout the war.
Virtual Enigma is a 3d Enigma simulation which can run using just your browser. No install is necessary. It was released on Alan Turing's 109th Birthday 23rd June 2021
Virtual Hagelin M-209
A 3D simulation of the Hagelin M-209 cipher machine
In cryptography, the M-209, designated CSP-1500 by the Navy (C-48 by the manufacturer) is a portable, mechanical cipher machine used by the US military primarily in World War II, though it remained in active use through the Korean War.
The M-209 was designed by Swedish cryptographer Boris Hagelin and manufactured by Smith & Corona in Syracuse (New York, USA). It was based on the C-38 which itself was an improvement of an earlier machine, the C-36.
This software is an accurate simulation of the M-209 Cipher Machine, used by the US Military during World War 2. The M-209, the American licensed version of the Hagelin C-38, was a portable hand operated cipher machine for tactical messages. It had the size of a lunchbox and presented a brilliant mechanical design, developed by the Swedish cryptographer Boris Hagelin.
This simulator, fully compatible with the original cipher machine, enables realistic operation with rotating wheels, setting of wheel pins and drum lugs, combined with authentic graphics. The program comes with a very complete helpfile, containing the manual, the enciphering procedures from the US military and all technical details on the machine.
GoldWave
Digital Audio Editing Software
Record • Restore • Convert • Analyze
For over 30 years we have designed and refined audio editing software that is intuitive, reliable, and affordable. We created GoldWave to do everything from recording and editing to sophisticated audio processing, restoration, enhancements, analysis, and conversions.
Mp3tag is a powerful and easy-to-use tool to edit metadata of audio files.
It supports batch tag-editing of ID3v1, ID3v2.3, ID3v2.4, iTunes MP4, WMA, Vorbis Comments and APE Tags for multiple files at once covering a variety of audio formats.
Furthermore, it supports online database lookups from, e.g., Discogs, MusicBrainz or freedb, allowing you to automatically gather proper tags and download cover art for your music library.
You can rename files based on the tag information, replace characters or words in tags and filenames, import/export tag information, create playlists and more.
Rename files at once. One of the most powerful renamers. And it's freeware.
One For All
Samplitude Pro X provides recording and mixing engineers with sophisticated functions and a revolutionary DAW workflow. Edit in real time, during recording. Apply effects in a custom manner to individual clips. Visualize volume, frequency and phase information for selected tracks. Use batch export for automated editing of multiple files at once. Shape your sound – with more detail, efficiency and control.
Session is an end-to-end encrypted messenger that minimises sensitive metadata, designed and built for people who want absolute privacy and freedom from any form of surveillance.
If other audio CD extraction solutions have left you feeling perplexed, you will love Easy Audio Copy. The application guides you through the process step by step. There are no complex configurations, nor additional components to be downloaded. Everything works straight out of the box! During the extraction process, Easy Audio Copy is able to handle all the necessary decision-making itself. The user is asked only a few questions about their preferences.
- Is Easy Audio Copy as reliable and exact as Exact Audio Copy?
Yes, Easy Audio Copy is at least as reliable and exact as Exact Audio Copy as they are based on the same extraction methods. Easy Audio Copy benefits from various optimisations which increase extraction speed but ensure the reliability. The main difference is the interface which is much simpler and can be used without any background knowledge of the processes involved.
Exact Audio Copy is a so called audio grabber for audio CDs using standard CD and DVD-ROM drives. The main differences between EAC and most other audio grabbers are :
- It is free (for non-commercial purposes)
- It works with a technology, which reads audio CDs almost perfectly. If there are any errors that can’t be corrected, it will tell you on which time position the (possible) distortion occurred, so you could easily control it with e.g. the media player
With other audio grabbers you usually need to listen to every grabbed wave because they only do jitter correction. Scratched CDs read on CD-ROM drives often produce distortions. But listening to every extracted audio track is a waste of time. Exact Audio Copy conquer these problems by making use of several technologies like multi-reading with verify and AccurateRip.
ere are a list of my picks of free and low-cost software tools. I am sticking with Samplitude Professional for audio and Adobe Photoshop and Adobe Photoshop Lightroom for photo-graphics. The other alternatives, however, are wide open.
Advanced Renamer is a program for renaming multiple files and folders at once. By configuring renaming methods the names can be manipulated in various ways.
It is easy to set up a batch job using multiple methods on a large amount of files. The 14 different methods enables you to change the names, attributes, and timestamps of files in one go. The files can also be copied or moved to new locations based on information in the files.
With Advanced Renamer you can construct new file names by adding, removing, replacing, changing case, or giving the file a brand new name based on known information about the file.
Before performing the operations on the files you can verify that the output will be correct and if you perform the rename and regret it, you can undo the complete batch.
Md5Checker is a free, faster, lightweight and easy-to-use tool to manage, calculate and verify MD5 checksum of multiple files/folders (Screenshots):
- Calculate and display MD5 checksum of multiple files at one time.
- Use MD5 checksum to fleetly verify whether files have been changed.
- Load, save, add, remove and update MD5 checksum conveniently.
- It is about 300 KB and does not require any installation (portable).
Speak Freely is a 100% software-based VoIP phone originally written in 1991 by John Walker, founder of Autodesk, and Brian C. Wiles. Over the years since, other VoIP applications popped up, but Speak Freely was the first VoIP application (or Internet telephone) released to the public.
Software Library: Palm and Palmpilot
Palm was a line of personal digital assistants (PDAs) and mobile phones developed by California-based Palm, Inc., originally called Palm Computing, Inc. Palm devices are often remembered as "the first wildly popular handheld computers," responsible for ushering in the smartphone era.
Microsoft has open-sourced another bit of computing history this week: The company teamed up with IBM to release the source code of 1988's MS-DOS 4.00, a version better known for its unpopularity, bugginess, and convoluted development history than its utility as a computer operating system.
The MS-DOS 4.00 code is available on Microsoft's MS-DOS GitHub page along with versions 1.25 and 2.0, which Microsoft open-sourced in cooperation with the Computer History Museum back in 2014. All open-source versions of DOS have been released under the MIT License. //
The publicly released version of MS-DOS 4.00 is known less for its new features than for its high memory usage; the 4.00 release could consume as much as 92KB of RAM, way up from the roughly 56KB used by MS-DOS 3.31, and the 4.01 release reduced this to about 86KB. The later MS-DOS 5.0 and 6.0 releases maxed out at 72 or 73KB, and even IBM's PC DOS 2000 only wanted around 64KB.
These RAM numbers would be rounding errors on any modern computer, but in the days when RAM was pricey, systems maxed out at 640KB, and virtual memory wasn't a thing, such a huge jump in system requirements was a big deal. //
Microsoft has open-sourced some other legacy code over the years, including those older MS-DOS versions, Word for Windows 1.1a, 1983-era GW-BASIC, and the original Windows File Manager. While most of these have been released in their original forms without any updates or changes, the Windows File Manager is actually actively maintained. It was initially just changed enough to run natively on modern 64-bit and Arm PCs running Windows 10 and 11, but it's been updated with new fixes and features as recently as March 2024.
git-annex allows managing files with git, without checking the file contents into git. While that may seem paradoxical, it is useful when dealing with files larger than git can currently easily handle, whether due to limitations in memory, time, or disk space.
git-annex is designed for git users who love the command line. For everyone else, the git-annex assistant turns git-annex into an easy to use folder synchroniser.
Created by teachers, Gibbon is the school platform which
solves real problems encountered by educators every day.
Being free, open source and flexible Gibbon can morph
to meet the needs of a huge range of schools.
Elevate Your Presentations with FreeShow
A dynamic, user-friendly, and open-source presenter built for all of your presentations. //
Every year churches spend hundreds of millions of dollars on the software needed to operate effectively and efficiently. We believe that within the Church the talent exists to create all the software that churches need and provide it free of charge.