RInject is a tool for automated testing of web applications and services. It can be used to test HTTP(S) interfaces for service-level monitoring.
Compared to WebInject, RInject has a more powerful verification- and parsing-engine.
AFTER is a configurable test engine written in Ruby. Libraries can be added to facilitate testing against any application type. It also allows for test scripts to be written in any format provided there is an associated script reader for that format.