Nintendo DS/DSi

Linker Cart

RetroGameFan Multi Cart Update - https://gbatemp.net/threads/retrogamefan-updates-releases.267243/
Latest linker official release - http://www.linfoxdomain.com/nintendo/ds/
R4-Download - http://www.r4isdhc.com/r4-download/
~~http://r4i-sdhc.com/downloade.asp~~
~~http://www.r4wood.com/pages/R4i-SDHC-Kernel.html~~
Cheat Database - https://gbatemp.net/threads/deadskullzjrs-nds-cheat-databases.488711/

Community Network Play

WFC Replay - https://github.com/Prof9/wfcreplay
Wiimmfi - https://wiimmfi.de/
- KWFC - https://gist.github.com/jaames/5e1c0fcea96a3e47f888526d28531720
- PokeClassic - https://pkmnclassic.net/