http://www.winehq.org The Wine Project headquarters. Be sure to vote for your favorite Windows application to be ported using Wine in the Applications Database section.
http://www.von-thadden.de/Joachim/WineTools WineTools offers a relatively painless installation of Wine and a number of well-known free applications, including Internet Explorer.
http://www.codeweavers.com Codeweavers, Inc., the makers of Crossover Office.
http://frankscorner.org This site helps you get the most out of Wine. It includes FAQs and HOWTOs to get you through most problems.
http://www.vmware.com VMware Inc., where you can get information and a free 30-day evaluation copy of this virtual machine.
http://www.win4lin.com Win4Lin, helping people run Windows 98 applications and now Windows 2000/XP applications.
http://dosbox.sourceforge.net The DOSBox site. Check on support for your DOS game and even find downloadable copies of some ancient games.
http://dosemu.org The home of dosemu, the DOS emulator.
http://freedos.org The FreeDOS project. Assorted applications to use in DOSBox or dosemu.
http://www.students.uni-mainz.de/bauec002/B2Main.html Home of the Basilisk II MacOS emulator.
http://os-emulation.net/basiliskII/system753_tutorial/linux A tutorial on installing and running Basilisk II on Linux.
http://www.cl.cam.ac.uk/Research/SRG/netos/xen The Xen virtual machine monitor project home.