Overthere is a Java library to manipulate files and execute processes on remote hosts, i.e. do stuff "over there". It was built for and is used in the XebiaLabs deployment automation product Deployit as a way to perform tasks on remote hosts, e.g. copy configuration files, install EAR files, or restart Web servers. Another way of looking at it is to say that Overthere gives you java.io.File and java.lang.Process as they should have been: as interfaces, created by a factory and extensible through an SPI mechanism.
wsh allows you to execute commands on multiple machines in parallel. It is secure and fast, and even outperforms ansible. It works by having an agent live on the machine. When you run wshc, it sshes and execs wshd and sends commands over the encrypted channel. wshd executes the commands and sends the results back.