Are there any freely available WMS tile servers?

Question

I am looking for an open public endpoint to retrieve WMS map tiles from, for use with leaflet maps

For clarity, I am not looking to set up a tile server or for tile server software.

It looks like the NASA service is now closed

Answer 1

If you only need WMS here you'll find the OpenGeo WMS server:

http://www.mapmatters.org/server/3222

and many others here:

http://www.mapmatters.org/keyword/WMS