soapUI, is the world leading Open Source Functional Testing tool for Web Service Testing. It supports multiple protocols such as SOAP, REST, HTTP, JMS, AMF and JDBC. soapUI is from eviware, the Open Source TestWare Company.
websnapr lets you capture screenshots of (almost) any web page. Allow your visitors to instantly visualize any web page before clicking. Increase site traffic, click-through rate and site stickiness.
tagthe.net then returns a set of tags based on the textual content you specified. The service is mainly designed for developers, building applications that make use of tagging.