A good, easy to navigate bass website with free lessons, helpful tips, an online fretboard learner, tuner, metronone, downloadable bass tab paper, and much more.
PTB, a cool site with some great bass desktop graphics and posters, flash cards for learning, staff paper, and an extensive bass database. I really appreciate that Sean McMillin has put together this site for the love of bass guitar.
http://www.activebass.com/ - Active Bass On-Line Bass Community. Great resource for learning, networking, bass tabs and more.
Mari's card game software:
What your fingers should be doing when you're not playing
the bass... play cards!
Card games by SpiteNET