Xeno-RAT is an open-source remote access tool (RAT) developed in C#, providing a comprehensive set of features for remote system management. Has features such as HVNC, live microphone, reverse proxy, and much much more!
wmiexec2.0 is the same wmiexec that everyone knows and loves (debatable). This 2.0 version is obfuscated to avoid well known signatures from various AV engines. It also has a handful of additional built in modules to help automate some common tasks on Red team engagements.