It is opensource
You can run it on testnet with the --testnet command line switch
It supports multisig too.
HI, thanks for Response. I am more interested in running electrum on test-net, but unable to find any clear doc on that. Can you explain, How to use test-net in detail? I have openned a new discussion on this https://bitcointalksearch.org/topic/m.18756326.
I have explained above how you can use electrum with testnet. You run it with the --testnet command line switch:
Run `electrum help` to see more options. If you are using windows then command line switches are typed in a terminal window.
In future try and read the answers you are given. Otherwise there is no point in you asking questions and us answering them.