Textr
(Name & number, separated by tab or semicolon. One person per line. You can paste in rows from Google Sheets. Middle columns are ignored.)
Available tokens: {firstname}, {myname}
To:
Message:

Fill in all fields

Shortcuts
send SMS:
Ctrl+Enter
copy message:
Alt+Shift+C
call:
Ctrl+Shift+Enter
previous/next person:
Alt+Shift+< / >
show call QR code:
Alt+Shift+Q