Metaclick is described as 'MetaClick does mouse clicks for you when you're unable to click, or when clicking is an opeation that takes a lot of effort' and is an app in the OS & Utilities category. There are three alternatives to Metaclick for Windows. The best alternative is Point-N-Click, which is free. Other great apps like Metaclick are Clikka Mouse Free (Free) and ClickAid (Free).
ClickAid is a FREE stand-alone on-screen mouse aid designed for anyone who has difficulty switching between mouse buttons or double clicking on a physical computer mouse. It will work with all mouse systems including head mouse and touch screen devices.