Electrum-supported coins

Argentum (ARG) - https://github.com/argentumproject/electrum-arg
Bitzeny (ZNY) - https://github.com/BitzenyCoreDevelopers/electrum-zeny
Creativecoin (CREA) - https://github.com/creativechain/electrum-crea
Dash (DASH) - https://github.com/dashpay/electrum-dash
Dogecoin (DOGE) - https://github.com/Andymeows/electrum-doge*
FairCoin (FAIR) - https://github.com/FairCoinTeam/electrum-fair
FreiCoin (FRC) - https://github.com/FreicoinAlliance/electrum-frc
Fujicoin (FJC) - https://github.com/fujicoin/electrum-fjc
Groestlcoin (GRS) - https://github.com/Groestlcoin/electrum-grs
Internet of People (IOP) - https://github.com/Anfauglith/electrum-iop*
Litecoin (LTC) - https://github.com/pooler/electrum-ltc
Machinecoin (MAC) - https://github.com/Nigho/electrum-machinecoin*
MonaCoin (MONA) - https://github.com/wakiyamap/electrum-mona
Neblio (NEBL) - https://github.com/NeblioTeam/electrum-nebl
OKCash (OK) - https://github.com/okcashpro/ok-electrum-client
ParkByte (PKB) - https://github.com/parkbyte/electrumparkbyte
Potcoin (POT) - https://github.com/potcoin-repos/electrum-pot
ReddCoin (RDD) - https://github.com/reddcoin-project/reddcoin-electrum
SHIELD (XSH) - https://github.com/ShieldCoin/electrum-XSH
SmartCash (SMART) - https://github.com/rc125/electrum-smart*
Spacecoin (SPACE) - https://github.com/midnight-miner/electrum-space*
Stratis (STRAT) - https://github.com/stratisproject/electrum-stratis
TeslaCoin (TES) - https://github.com/TeslacoinFoundation/Electrum-Tesla
TrumpCoin (TRUMP) - https://github.com/Skirmant/electrum-trump*
Unitus (UIS) - https://github.com/unitusdev/electrum-uis
Vcash (XVC) - https://github.com/openvcash/electrum-xvc
Verge (XVG) - https://github.com/vergecurrency/electrum-xvg
Vertcoin (VTC) - https://github.com/vertcoin/electrum-vtc
Viacoin (VIA) - https://github.com/vialectrum/vialectrum/
A number of these may not have been developed by the official coin devs, specifically the ones marked with *.