Configure pidgin for google talk (jabber) and use it to communicate with others whether it is from their email or their android phone.

All it requires is a gmail account or google app account. Add an account int pidgin and select XMPP.

Se below screenshots for configuring your pidgin.

Connection security: Require encryption

Connect port: 5222

Connect server: talk.google.com

File transfer proxies: proxy.eu.jabber.org