Web WinAmp
Webamp, it really whips the llama's ass!
Public
Build your own NeXT with a virtual machine
Instructions on getting a NeXT machine up and running in a VM.
CloudpilotEmu: A PalmOS emulator for the web
A PalmOS emulator that can run in the browser; could be interesting if I ever want to try and play with any of my old Palm code again.
IDE for Interlisp and Common Lisp
Online IDE for Interlisp (and Common Lisp).
Card punch emulator
Fun little punch card generator site -- makes an image of a punch card.