Try Asteriskguru Operator Panel

I used a asteriskguru product name Asteriskguru Operator Panel (Freeware)

Recently, I found another one name ASTassistant, developed by Realbasic. (It is possible to use on Linux, but they have not test it yet)

I have test two softwares, I like ASTassistant better.

Links
Asteriskguru Operator Panel
ASTassistant