There's NTR Launcher and NTR Launcher 3D.
I may not have been clear, I'm asking for a way to boot a legit slot 1 nds flashcard via a 3dsx homebrew, not a CIA. I want to keep my console as clean as possible, launching CIAs gets into activity log so I'm looking for a way to launch my slot 1 cartridge from homebrewlauncher. It seems TWLoader can boot my flashcart just fine from its 3dsx version, I'm asking if it would be possible to make a "quicklaunch" version that just boots the nds cartridge in slot 1 from hombrew launcher.