Open Source MS-DOS Business Software

A famous scientific plotting package, features include 2D and 3D plotting, a huge number of output formats, interactive input or script-driven options, and a large set of scripted examples.

4tH is a Forth compiler with a little difference. Instead of the standard Forth engine it features a conventional compiler. 4tH is a very small compiler that can create bytecode, C-embeddable bytecode, standalone executables, but also works fine as a scripting language. It supports about 95% of the ANS Forth CORE wordset and features conditional compilation, pipes, files, assertions, forward declarations, enumerations, structures, suspended execution, recursion, include files, etc. It comes with an RPN calculator, BASIC interpreter, line editor, preprocessor, compiler, decompiler, C-source generator, a virtual machine, and a multitasking environment.

Here is a c_version of Thomas Bleeker's pnglib 1.0, a free graphy library. His site is https://www.madwizard.org/programming/projects/pnglib Thomas's original code is x86-asm. She(the code) can read and display PNG images in programs, and link without Zlib. With the author's permission, Leisure bamboo translate her to c. So she can be compile by turbo c 2.0, borland c 4.5, visual c 6.0, keil c51 7.5, or others. Some(not all) plainform where she can run, as below: 1)dosbox, see about her in sample.tc2. dpmi.bc4; 2)window, see about her in sample.bc4, dpmi.bc4, sample.vc6; 3)c51's uv2 simulator, see about her in sample.uv2; 4)arm singlechip, that is cino f780 barcode scanner. She can decompress apng(Animated PNG) now, There are some demo file 01.png, 04.png ... 32.png in root folder. She is small(12k for vc6, 32bit code; 21k for bc4, 32bit code; 27k for tc2, 16bit code) and beautiful.

A small and easy to use framebuffer graphics library

Hebcal, a perpetual Jewish Calendar, has moved to GitHub

Scheduling program for travel agencies and tour operators, for flights, hotels, carrentals and with flexibility to change / add / remove later.

Pc Calculator is a clever note and formula editor combined with an advanced and strong scientific calculator. Being an editor it is extremely user-friendly allowing all possible typing and other errors to be easily corrected and fast recalculated.

Calculator++ is an Open source Scientific Calculator app designed to replace the standard Calculator app. Currently in MS-DOS Format.

FoxCalc is a calculator with a text user interface (TUI), compiled for DOS. It supports a mouse, and uses the GMP library, therefore its results are highly accurate. FoxCalc is distributed as a zip FreeDOS package. That way, it can be easily installed using the FreeDOS package manager.

Modeline calculator designed to calculate low resolution modelines for CGA, EGA, and VGA arcade monitors, NTSC and PAL televisions, and multisync PC monitors. Supports X11, fb, and AdvanceMAME modeline formats.

kalc is a programmable scientific calculator, using RPN (Reverse Polish Notation). Its behaviour imitates a HP48/HP49 calculator. Works with real and complex numbers, unlimited size integers, arbitrary-precision real numbers and more.

CL - Matrix - GUI: The main purpose of the project addressing to the command line prompt riders.. This will be wokring mainly as a library for C++, allowing programmers to use pseudo grafics in their applications. CL - Matrix - Enviroment: A real envi

The Doc2Html command line operating program strippes the Word produced html files (by opening the documet, saving as html) leaving pure text + minimum html code. It also has a mode to convert data berween different charsets: DOS, Windows-1250 and ISO-8859

Millennium OS is a GUI for both MS-DOS and FreeDOS PCs. Written in QBasic & DJGPP, it is 16-bit, but it has a nice desktop for old & new processors. Check out: http://www.datacomponents.us.tt/ FOR MORE INFO.

Long before we all became obsessed with licences, people would simply make their source code available and call it freeware. There were code listings in Magazines, archives of code on BBSs, CD-ROMS ... This site tries to rescue this old source code from obscurity and make it available for the current FreeDOS community and for future reference. Available as a git repository only. This is NOT the place to look for ready-to-link libraries. These are the code bases of full DOS applications (mostly small command-line utilities) sorted in various language families. It is the hope that they will give current FreeDOS developers inspiration to develop the ideas in this code further, adapt them to more modern compilers, and see what DOS programmers were up to back in the 1980s. If something of yours was included here by mistake and is in fact proprietary code, let me know and I will take it down.

ConjuGNU is a GNU verb conjugation program. It will soon become a fully fledged grammar checker, hopefully to be integrated in OOo. Currently only for Spanish, it will include English, French, Italian, Portuguese and others, most likely in that order.

Equalculator is an equation calculator. It is currently in the "pre-alpha" stage of development, so don't expect it to do miracles. You type in your equation, it will ask you for the variables and Voila!, it gives you the answer.

Do you still have PFS:First Choice database files? First Choice was a great DOS-base flat file database program. The program, first2html, reads the file and converts it to HTML, as a TABLE. You can put your First Choice database into a web page!

FreeDOS Reisdent Calculator -- programmer's TSR calculator.

Hyperzelo is specially designed software which is used in computer web applications combining projects with frameworks especially in Github synonym application. This application aims to facilite the reception of data quickly and allow the data of this application to be used on the stable web in the reception of any device that uses it

Several msdos applications to be used on emulators.

KICK (Kasseler Investment Club Kalkulation) is a bundle of PERL scripts to manage the finances of an investment club (german documentation).

Small tools for diverse usage. Targeted for the win32-console or as 'small' GUI's (win32)

MSGraph is a program designed for the interactive, fast, qualitative analysis of mass spectrometric (MS) data. It is a tool to provide fast and simple access to all the information contained in an LC/MS analysis run.

Mundo-Bioq permit to collect patient data, analysis data, and accounting of laboratory data. It's focused to small laboratories that speak spanish. It's developed in FoxPro/DOS and run in in DOS, but also can run in Linux (under DOSEMU), and any Win