G Filter
I've made the script driving the Lewis tracker available for download here. (I have a couple of further ideas and even half-finished pages for david-lewis.org, but they currently suffer from a lack of time and money. Suggestions about useful content are of course welcome.)
There is a similar site about Quine: http://www.wvquine.org/
I am not suggesting that you should include as much stuff as that site, however it might provide some helpful content ideas.