Drawing Tools for drawing array/linked list images

Question

I'm thinking of writing few blogs on arrays and linked list and for that I need some good drawing tool for drawing images to explain the concept and the logic. I don't want to copy/paste images from other source so if anyone among you knows about any such tool in which I can create images fast and similar to ones given in books and on other site, please let me know.

Answer 1

Graphviz can draw linked data structures by using special "record" node shapes. Here's one example which was automatically generated during a debug session.

Answer 2

I believe that Google Docs Draw, could satisfy your needs.

http://googlesystem.blogspot.com/2009/03/drawing-in-google-docs.html