3ds Emulator — Citra [best]

In early 2024, the original Citra project was following a legal dispute involving the Yuzu emulator (Nintendo Switch emulator). However, Citra remains open-source, and community forks like PabloMK7’s Citra and Citra MMJ (for Android) continue to release updates. You can still download the last official build, but new features and fixes are now found in community-maintained versions.