Ugopwn
Ugopwn is an exploit for the DSiWare game Flipnote Studio. It was the first exploit capable of loading homebrew on 1.4.2 or higher without access to console certs, and prior to the release of Unlaunch, it was used to install a DSiWareHax exploit with the known console certs due to this exploit being tedious to use.
Usage
You can use Ugopwn to load homebrew software. The exploit is rather inconvenient because you have to paste the first flipnote's page into the second flipnote 122 times. Thankfully, there is a much easier exploit called "Flipnote Lenny" that just requires you to copy one page and paste it into another page. Easy, right?