Go gaga over Machine Learning

Here is a mindmap created using github and other resources that gives you test automation tools in every possible technology and phase in product lifecycle:


Source: https://github.com/AdyKalra/awesome-test-automation

Not endorsing stealing but it's a sweet hack!

http://www.slideshare.net/korlayashwanth/download-disabled-slide-share-ppts-by-authors

Enjoy :P

General API testing guide is useful for background reading: http://www.soapui.org/testing-dojo/welcome-to-the-dojo/overview.html SmartBear also has a pdf http://www2.smartbear.com/rs/smartbear/images/SmartBear-SoapUI-101-eBook.pdf
A useful resource for learning against a dummy REST API to try your SOAPUI testcases on, either to play with on their server or install it yourself and mimic your api. http://jsonplaceholder.typicode.com/

Source: http://www.softwaretestingclub.com/forum/