Can you recommend me a software for login google voice?

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Hello everyone,Everyone knows that google voice is a very good way for free call.however,when I use it I must login my gmail frist ,This is not very convenient,how did you use it? have you use any software for login your account and do no through your gmail? Can you recommend me a good software Instead of gmail ?so I can use it Dials and answer my friend's calling convenient.thank you !