I use lots of SD cards (well, micro SD) to install different OS-es on the Raspberry Pi. The problem is that a lot of the times I can’t use the SD card on another computer anymore because I can’t format it for my Mac, let’s say.
Well, I found SD Card Formatter, a free app from the SD Card Association that solves this issue. And here it is, just so I don’t forget about it, because it’s not the first time I “discover” it.