I am here to tell you about a great softmod for the 3DS i personally use. It allows you to play games outside your region as well as being able to hard install 3DS applications (Sort of like .apk files for an Android Phone). Not to mention if you have a N3DS you can stream your screen to your computer to record video with it. If you would like to get this then your in luck as there is a guide to get it.
For those confused and wondering what are the benefits I will list them off.
1. Region Locking patched to allow games from all regions to be loaded on the unit.
2. Able to hard install 3DS applications to the 3DS (Previously only able to be done with eShop, allowing you to install homebrew apps)
3. Allow you to use parts of your 3DS that were only available to some people (ex. GBA Virtual Console)
4. Able to install custom themes and badges.
5. New 3DS only: stream live gameplay to your PC wirelessly with NTR CFW
6. Dump your 3DS cartridges to an installable file, saving you from having to carry them around as you can just install them directly to the 3DS (SD Space required)
For a tutorial on how to do this, be sure to follow this guide and as long as you follow the instructions to the letter then almost nothing can go wrong.