"Running Windows 3.1 in VMware …. but annoyed by having to grab and ungrab the cursor manually?" Buckley asks in the project's README. "Wish you could just move the cursor in and out like a modern OS (one with USB tablet support or VMware Tools drivers), with no Ctrl+Alt dancing? Or want to control your cursor at all under the ESXi web UI?"
His answer to those questions is: "With this driver, now you can."