Citrix Multiuser (1991) 1 OS2

Citrix Multiuser is a customized version of Microsoft OS/2 1.21 that turns it in to a real multi-user operating system. With Citrix Multiuser, users can connect and simultaneously run character cell based applications from remote serial terminals. To prevent users from interfering with each other, it adds security permissions to devices and files. It can use multi-port serial port boards like the Digiboard, or any serial device that has OS/2 1.21 drivers. based application or DOS executables, and programs can not use graphics modes. It also does not have support for networking. separation, which was an almost instant fatal blow as Citrix was licensing OS/2 code through Microsoft. making MS-DOS multi-user until eventually they released a Windows NT based version.

• 1.0
• 2.0

Citrix Multiuser Link (1991) 0 Communications DOS OS2

Multiuser Link is a telecommunications program that Connects a PC running DOS or OS/2 to a Citrix Multiuser system via standard RS-232C serial directly or with a modem.

• 1.0

Corel Linux (1999) 2 Linux

Corel Linux was a short-lived commercial Linux distribution that attempted to compete directly against Microsoft Windows 98/2000.

• 1.x

Firefox (2005) 6 Web Browser Windows Linux Mac OS X

Firefox is a web browser based on the open source Mozilla web browser. It was intended to be lighter weight and faster than Mozilla, separating the e-mail client in to the new Thunderbird product. At release, it implemented better support for web standards than Microsoft Internet Explorer. Firefox included features such as tabbed browsing and support for add-ons.

• 1.x
• 2.x
• 3.x

Gentus Linux (2000) 52 Linux

Gentus Linux is a distribution produced by ABIT, enhanced for use with their line of motherboards. (Enhanced IDE drivers, etc) ABIT's Gentus Linux was notorious for failing to comply with the GPL.

• 3.x

IBM CAD/3X (1993) 0 Graphics OS2

IBM CAD/3X is an entry level, easy to use, 2D cad program with versions for both DOS and OS/2 1.30.

• 1

Linux Kernel (1991) 1 Linux

Linux, originally created by the Finnish programmer Linus Torvalds, is a Unix-like operating system loosely inspired by Minix. The pivotal difference, however, was how it was licensed. Unlike Unix operating systems that remained expensive and proprietary, Linux and its source code were licensed for free distribution, with the provision that all changes or additions to the source code must also be released for free.

• 0.x

Mandrake Linux (1999) 22 Linux

Mandrake Linux was a highly polished and easy to use Linux distribution, originally based on Red Hat Linux with KDE. In 2005, Mandrake Linux became Mandriva.

• 6.5
• 7.0
• 9.0 PowerPack

Micrografx Designer (1988) 2 Graphics Publishing Windows OS2

Micrografx Designer, originally released as IN-A-VISON for Windows 1.x, is a vector based drawing and design program. It features ease of use, multiple layers, and dimensioning. Micrografx also sold large libraries of clip art. It competed against Corel Draw.

• 2.0

Microsoft Excel (1985) 17 Spreadsheet OS2 MacOS Windows

Excel, from Microsoft, is a powerful spreadsheet application for Mac, Windows, and OS/2. Excel was first released for the Mac. When it was ported to Windows 2.x, they started at version "2.0" to one up current Mac version. There was never a DOS version. Instead, DOS and 8-bit platforms used the older Microsoft Multiplan. Excel was later bundled as part of Microsoft Office

• 2.2
• 3.x

OS/2 1.x (1986) 22 OS2

OS/2 was originally a joint effort between IBM and Microsoft. It grew out of efforts to create a Multitasking MS-DOS. It was intended to be the future OS for IBM's new PS/2 series. At release it competed against Microsoft's Windows GUI shell, but most users continued to use DOS. OS/2 1.x was used as the basis for Citrix Multiuser | 1.x | 2.x | 3.x | 4.x | All |

• Pre-Release
• 1.0
• 1.1
• 1.2
• 1.3

OS/2 3.x (1994) 23 OS2

OS/2 3.0, marketed under the name "OS/2 Warp", reduced memory usage over OS/2 2.x and included Internet access software. The "Connect" version includes Ethernet networking and peer-to-peer file sharing. The "Blue Spine" editions bundle the Windows 3.1 files so no additional software is needed to use the Win-OS/2 subsystem. It was followed up by OS/2 Warp 4. | 1.x | 2.x | 3.x | 4.x | All |

• 3.0
• 3.0 PowerPC Edition

Red Hat Linux (1997) 14 Linux

Red Hat Linux was a popular early Linux distribution, that was made available as a boxed set available in stores.

• 5.0

Xandros Linux (2003) 7 Linux

Xandros Linux is a proprietary variant of Linux that sprung up out of the proprietary Corel Linux after they sold off their Linux business.

• 2.x
• 3.x

Xenix (1984) 20 Linux

Xenix was the variant of UNIX originally published by Microsoft, later sold to SCO. It added a variety of technical enhancements over System V Unix, including a menu-driven business shell. It was ported to many different platforms from a PDP-11 including the Altos 8600 (First x86 port), IBM PC, Intel System 86, TRS-80 Model 16, SCP Gazelle II, and Apple Lisa. The Xenix Software Development System, Microsoft Multiplan 2.x and Microsoft Multiplan 3.x, Microsoft Word 3.0 and Microsoft Word 5.x, and FoxBase Plus 1.00

• IBM PC 2.00