Trebuchet is a MUCK client that Revar wrote in 1998. Written in Tcl/Tk, it has a graphical interface and runs on most operating systems. It supports MCP, allowing it to display graphical widgets and do other complex interactions beyond merely transferring text when connected to a server that supports MCP, like fbmuck. This includes graphical control of some MUCK programs.
Development seems to have drastically slowed after 2016, yet many furries still use it. In 2019, Trebuchet's GitHub repository was transferred from Revar to Wyld.