The primary Web Service Protocols are:
SOAP
Burp Suite: An integrated platform for performing security testing of web applications.
REST
Soap
Rest
OWASP Testing Guide v4 [PDF Download]
Penetration Testing Execution Guidelines
Shodan: Searches for IP enabled devices
WS-Attacks: Describes attack vectors for Web Services
MetaSploit: app for Penetration Testing
DVWA: Web App with vulnerabilities for testing
Samurai: A live linux environment that has been pre-configured to function as a web pen-testing environment