I have been working on a web services related project for about the last year. Our team found soapUI near the start of our project and we have been mostly(*) satisfied with it (the free version, that is).
My question is: are there other tools/clients/frameworks that you have used/currently use for web services testing and would recommend?
(*) There are some weird GUI glitches that appear once in a while. As is mentioned by some of the answers, we attributed this to a memory leak.