LyX

Open Source Tex/LaTeX editor

LyX is a document processor that combines the power and flexibility of TeX/LaTeX with the ease of use of a graphical interface. You can use LyX to create a letter, novel, theatre play, film script, academic articles, thesis, and books.

Open Source Operating System

ReactOS is an open source computer operating system intended to be binary compatible with application software and device drivers made for Microsoft Windows NT versions 5.x and up (Windows 2000 and its successors). A spin-off of a previous attempt to clone Windows 95, development started in early 1998, and has continued with the incremental addition of features already found in Windows.

Ope Source Operating System

FreeDOS (formerly Free-DOS and PD-DOS, often abbreviated to FD or FDOS) is an operating system for IBM PC compatible computers. FreeDOS is made up of many different, separate programs that act as "packages" to the overall FreeDOS Project. As a member of the DOS family, it provides mainly disk access through its kernel, and partial memory management, but no default GUI (although OpenGEM is listed on the official FreeDOS website).

Convirt– Open Source Complete Virtualization Solution

ConVirt Open Source is a data center-wide solution for managing your heterogeneous virtualization infrastructure from a "single pane of glass". With support for VMware, Hyper-V, KVM, and Xen, ConVirt provides full lifecycle management of your virtualization environments, including provisioning, configuration, monitoring, administration, and advanced automation and orchestration