Latest Version : 2.6.4 Mac: https://electrum-dash.org/download/2.6.4/electrum-dash-2.6.4.dmg

Windows: https://electrum-dash.org/download/2.6.4/electrum-dash-2.6.4.exe

Linux: under construction

Electrum Wiki: https://dashpay.atlassian.net/wiki/display/DOC/Electrum+Wallet