Skycache – About:

This is a very quick and easy caching solution – I’ve checked it in on top of my (hacked-about-a-lot) {Wordpress} install and it does appear to make quite a difference. I might have to up the default store time, as I’m hardly a prolific poster, but I’m not sure how I can integrate a cache flush with a posting right now but I have a couple of ideas.

This is probably the first OSS software that is totally generic in approach and really did work with just one file copy and two extra lines in the main file.