The most interesting tool I have found is the
tool which allows you to take some pre-made bathrooms from the Bathroom Design Center at HGTV.com. Then adjust them to your liking. I found it to be very useful to match up some colors for your bathroom. It helps most matching up colors for your faucets and counter tops or your sinks and bathtubs. The Design Center at HGTV is centered around Kohler products. The picture to the right is the bathroom I designed today.
Some downsides to the Design Center is the choppy graphics of all the fixtures, you can't seem to make out all the details in the products that well. Also sometimes it is difficult for it to run on your computer properly. We had some difficulties on computers here for it to work consistently. You can't choose products other than Kohler so if you aren't a fan of Kohler then you won't be to pleased with this tool. Who doesn't love Kohler though. I couldn't change the tub faucet on the tub either which bummed me out a little but I'm over it.
Kohler also offeres a design tool on their website. Kohler's program goes into a little more depth than HGTV.com. Kohler allows you to customize your room size, and put in whatever Kohler products they have on their website into your bathroom. I did not have time to play around with this tool but it appeared to be really cool and useful.
Here is another shot of my bathroom design with the listings of the products I used in my design.
1. Toilet - Kathryn Elongated Toilet
2. Sinks - Memoirs Self-Rimming Basin
3. Faucets - Memoirs Widespread Sink Faucet
4. Tub - Portrait 6' Whirlpool
5. Towel Bar - Revival 24" Towel Bar
6. Toilet Tissue Holder - Revival Toilet Tissue Holder