Let's see how well BleachBit holds up for an open source program! Turns out it does great, and it has no ads or nagging upgrade options unlike paid products (or free versions of the same). BleachBit first appeared in various distros of Linux in 2008, and was then made available for Windows in 2009. Check out the link below if you want to try this awesome free program:
https://www.bleachbit.org/
P.S. sorry for the lack of the cursor in the video - Camtasia had some kind of bug that caused it to disappear when attempting to edit the video :/