Pennywise is a multiplatform desktop application that allows you to open anything in a small floating window that always stays on top of the other applications all the time, allowing you to multitask with ease. No need to keep struggling with alt + tab, use pennywise and have your work in front of you all the time.
Great idea but it's already been done for MacOS with an app called Helium that has much better shortcuts than PennyWise. Also that clown branding... nope.
