Some of my recent del.icio.us bookmarks:

☞ Ultimate Boot CD
— a couple dozen floppy-based vendor and general diagnostic tools all on one CD

☞ Desk stretches
— what to do when xwrits won’t let you type

☞ xwrits
— X program to time, suggest and enforce periodic breaks from typing

☞ Fun things you can do with a PGP/GnuPG key

☞ Ishkur’s Guide to Electronic Music

☞ The IBM glass engine
— "enables deep navigation of the music of Philip Glass", or dies trying