Waithax - 3DS ARM11 kernel exploit up to 11.1 released
User and resident hacker @Mrrraou has developed a public implementation of the 3DS kernel exploit known as slowhax. This is a huge step forward for the scene, however it only works up to firmware 11.1. While there are no user tools at the moment which take advantage of this development, expect tools very soon which can facilitate DSi downgrading among other hacks.
GitHub Repo
Ongoing Discussion