Better Homes and Gardens has a pretty easy online tool called Arrange-A-Room. After registering, you can design your own room, email the link to a friend, and post the url address for your creation on a teacher or student blog/website — and then describe it.
This site is particularly good for Beginning English Language Learners because all the furniture is labeled and it can be used for vocabulary development.
I’ll be posting it on my website under Student Rooms. You’ll also be able to find links to two other similar sites — Bravo TV’s Design Your Own Dream Room (which can be used without registering) and Design My Room.
Thanks to The English Blog for the tip on Arrange-A-Room.