Just ran across diagrammr today. Its quite interesting. You describe the components in an architecture or some sort of relationships and it takes the first and last words as the components and draws a line between them.

So for instance, you write:

`loadbalancer routes to webserver`

and 

`webserver routes to appserver`

There will be 3 boxes, one for loadbalancer, one for webserver and one for the appserver. There will also be lines connecting the 2 of them. I've decided to start to use this for quick diagramming of architectural concepts. Beats drawing lines yourself, give it a try.