Probably DSL (Damn Small Linux) which certainly works. It does, however, lack one or two niceties owpython and owtap to remember two. But it does let you run owserver which lets you pick up the data via a remote login from something else.
A great way of trying it out, but they don't expect to kick it up any versions cos the kernel's need to be newer and that's not what DSL is about.
http://owfs.sourceforge.net/dsl.htmlYou should be able to start up owserver and owhttd, point a browser at the appropriate place and see good stuff. Probably a pretty good compatibility test.