THINK C (1988) 11 MacOS

THINK C, originally from THINK Technologies and later Symantec, was a C compiler for the Apple Macintosh. Initially released in 1986 under the name "Lightspeed C", it featured libraries and extensions useful to creating native Macintosh applications. It competed with Macintosh Programmers Workshop.

• C++ 7.x
• C++ 8.x

Thunderbird (2005) 5 Communications Windows Linux Mac OS X

Thunderbird is an e-mail client based on the integrated Netscape/Mozilla e-mail client. With the release Firefox, it was spun off in to a separate standalone product. It includes the same HTML rendering engine used in Firefox to render HTML formatted messages.

• 1.x
• 2.x

Toast (1995) 14 Utility MacOS

Toast was a popular CD mastering and burning application for classic Apple Macintosh. It was created by Astarte, who sold it to Adaptec, and later Roxio. Adaptec sold a different program for IBM PC compatibles named CD Creator

• 2.x
• 3.x
• 4.x

Virtual PC (1996) 79 Virtualization MacOS Windows OS2 Mac OS X

Virtual PC started off originally as an x86 emulator for PowerPC Macintosh to run MS-DOS and Microsoft Windows. Connectix, the company that made it, was purchased by Microsoft. Virtual PC was then retooled into a virtualization tool for x86 systems. Microsoft discontinued Virtual PC in favor of a server-oriented virtualization product called Hyper-V.

• 1.x (Mac)
• 2.x (Mac)
• 3.x (Mac)
• 4.x
• 5.x
• 6.x
• 7.x

VisPro/C++ (1994) 1 OS2

VisPro/C++, from HockWare is a IDE and rapid application development tool for OS/2. Supports several of the more popular C++ compilers including VisualAge and MetaWare.

• 1.x
• 3.x

Watcom C/C++ (1989) 29 DOS Windows OS2

The Watcom C/C++ is a powerful compiler for DOS, Windows, and OS/2. Its key selling point was superior cross platform support. It supported DOS, extended DOS 32-bit, Win16, Win32, and OS/2. Notably, it was used to produce the video game DOOM as a 32-bit DOS extended program.

• 10.0

WordPerfect (1983) 167 Word Processor MacOS

During the late 1980's, WordPerfect was THE standard word processor for DOS based PCs in big business. Under DOS, it competed mostly against Wordstar. WordPerfect for Windows enjoyed some success in the early Windows environments, but was quickly displaced by Microsoft Word for Windows. Later Windows versions were part of Borland Office/Novell PerfectOffice/Corel Office/Corel WordPerfect Office.

• 3.x (Mac)