This is an implementation of the Forth 83 programming language for 8088/8086 computers running DOS. Forth contains many unique features and paradigms not found in modern languages.

This is a software development kit that assists developers in making add-ins for Lotus 1-2-3 4.x for DOS. Add-ins are binary programs that extend and enhance the functionality of the Lotus 1-2-3 spreadsheet without having to change the Lotus program itself.

Alpha Four and Alpha Five, from Alpha Software, are a relational database management system and rapid application development platform. It is now known as "Alpha Anywhere".

The Arity Prolog Compiler is an implementation of the Prolog language. It features a compiler that creates high speed executables in addition to an interpreter. It competed against the less expensive Borland Turbo Prolog.

ASSIST/I, by BDM Software, is an IBM Mainframe Assembler/Interpreter. It allows IBM mainframe assembler language programs to be written assembled, and executed in an interactive, non-IBM-mainframe environment.

Aztec C is a fast and efficient C language compiler that produced compact, fast code. Its featured support for many platforms including MS-DOS, Apple II DOS 3.3 and ProDOS, Commodore 64, Macintosh, CP/M-80, CP/M-86, TRS-80, Amiga, and Atari ST. Cross compiler hosts also included VMS and Unix. It competed against Microsoft C, Apple MPW C, Lattice C, and many others.

BABY/36 is an IBM System/36 RPG (Report Program Generator) programming language clone for the IBM PC.

This is a development library, from Sterling Castle, Inc., for BASIC that includes a screen builder for developing entry forms, a data manager database, a window manager that provides windowing functions, and a help message system.

Borland C++ targeted the professional application development market, while Turbo C++ targeted the home and hobbyist market. Borland C++ included additional tools, compiler code-optimization, and documentation to address the needs of commercial developers. In 1997 Borland C++ was replaced with Borland C++ Builder.

Borland dBase Compiler is a dBase add-on that enables developers to create standalone high speed compiled dBase application. Developed by Ashton-Tate, the creators of dBase, it guarantees 100% compatibility with existing dBase applications. Applications built with the dBase Compiler do not require that the dBase product be installed, nor does it require any distribution royalties. Compiled applications will run many times faster than in dBase's interpreted environment. It includes support for 386 systems.

Turbo Assembler is an x86 16-bit assembler from Borland. It competed against, and was often cited as faster than Microsoft Macro Assembler.

Turbo BASIC is a version of Basic sold by Borland. It features an IDE similar to later Turbo Pascal/C products. After Borland stopped selling it, it was purchased back by the original author and continued under the name PowerBASIC. Borland also released a set of Turbo Basic Toolboxes

Turbo C is an Integrated Development Environment and compiler for the C programming language from Borland. First introduced in 1987, it was noted for its integrated development environment, small size, fast compile speed, comprehensive manuals and low price. After 2.0 it this product was replaced with Borland Turbo C++. It competed against, Microsoft Quick C and was generally considered faster and more successful.

After Turbo C, Turbo C++ was Borland's home and entry level offering for a C/C++ compiler for MS-DOS and Windows. For a time, it was sold along side their professional Borland C++ product line.

Borland Turbo Pascal is a Pascal programming language compiler with an Integrated Development Environment targeted at the hobbyist and entry-level market. There were versions for CP/M and DOS. For a time, it was sold along side their professional "Borland Pascal" product line. Borland also produced a set of "toolbox" libraries along side their earlier versions.

Digital Research CBASIC is a BASIC implementation that "compiles" basic code in to interpreted byte code that is run using a royalty-free runtime. BASIC source code is not needed to run a program. CBASIC was a popular programming language under CP/M. There were also versions for MS-DOS. MBASIC's rounding errors that were sometimes troublesome for accounting. machine code. Later versions also included support for GSX graphics extensions.

The Clarion DOS extender is a tool that enables you to create 386 Protected mode applications for the Clarion Database.

Clipper, from Nantucket Corp and later Computer Associates, started out as a native code compiler for dBase III databases, and later evolved in to a full fledge database language and application development environment.

Clipper tools is a set of programming library extensions for Clipper. It adds functions such as multiple window customization, the ability to work with separate mono and color screens, multiple output effects for character strings, and color pallets.

CodeBase, from Sequiter Software Inc., is a fast database engine for C and C++ programmers. CodeBase comes with it's own report engine, which allows distribution, in which the user can create their own reports. CodeBase is portable across all major platforms.

CodeView was a standalone debugger created by David Norris at Microsoft in 1985 as part of its development toolset. It originally shipped with Microsoft C 4.0 and later. It also shipped with Visual Basic for MS-DOS, Microsoft Basic PDS, and a number of other Microsoft language products. It was one of the first debuggers on the MS-DOS platform that was full-screen oriented.

dGraph is a dedicated graphing package specifically designed to create graphs and charts from data stored in dBase databases. Fox and Geller also produced an almost identical product named RGraph, designed specifically for creating charts using R:Base databases.

Digital Research C is a compiler developed for use with Digital Research's CP/M systems. It was also ported to DOS.

PL/I is a programming language oriented towards scientific and business programming. Digital Research provided implementations for their CP/M operating system as well as MS-DOS.

Smalltalk/V was the first widely available version of Smalltalk. It was developed by Digitalk in 1986 for DOS, Macintosh, and later Windows.