CD or floppy boot/rescue/backup/maintenance system. It has support for a lot of filesystem types (Reiserfs, Reiser4, ext2/3, iso9660, UDF, XFS, JFS, UFS, HPFS, HFS, MINIX, MS DOS, NTFS, and VFAT) and contains a bunch of utilities for system recovery.
a Linux-like environment for Windows. A way to run native linux apps on Windows and make way to magically make native Windows apps aware of UNIX ® functionality after a rebuild.
Learn how you can use Virtual Server 2005 R2, now available as a free download, to increase hardware utilization and enable faster deployments of new servers.
a collection of utilities and technical information related to Windows internals by Mark Russinovich and Bryce Cogswell. Microsoft acquired Sysinternals in July, 2006.
aims to implement functions (not present on Windows 98 / ME) to kernel32.dll and other system libraries so that recent Windows XP applications and games work on Windows 98 / ME. (requires Windows 98 FE or Windows 98 SE or Windows ME)