SwitchSDTool allows you to create Switch NSP (downloaded content) files from your own Switch | GBAtemp.net - The Independent Video Game Community
NSPsplitty(GUI form nsp split tool) | GBAtemp.net - The Independent Video Game Community
nsZip - NSP compressor/decompressor to reduce storage | GBAtemp.net - The Independent Video Game Community
Goldleaf error 2002-4058 while trying to install nsp file. Have latest keys in Switch folder and sigpatches updated. More in comments. : r/SwitchPirates