You can try an online demonstration of Anka. There is a Java 2 version which needs to be downloaded, and will be used for drawing. For viewing, you could use any standard browser that supports Java 1.1 (no Java 2 plugin needed).

Download Anka (needs Java 2 pre-installed)
View Anka (should work through most firewalls)
View Anka (if the previous link didnt work, try this one)