j2 Global Communications

j2 Global Communications provides a variety of business-critical communications and messaging services through its global communications/telephony/messaging network. j2 provides services to more than 9.0 million subscribers around the world. j2's network provides billing, customer support, transport, and value-added applications and local presence on a global basis.

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eFax Messenger Plus
Trial version
Create, annotate, and send faxes and email.
Windows
eFax Messenger
Free
View faxes from their online fax service.
Mac
eFax - receive and send fax for iPhone or iPad
Free
Turn your iPhone and iPad into a portable fax machine with eFax - the world's leading online fax service.
iOS
jConnect
Free
Unify fax, voice, and conferencing into a single telephone number.
Webware
Hotsend
Free
send perfectly formatted documents to others via email -no viewer needed !
Windows
j2 Messenger
Free
online faxing and communications service
Mac
eVoice - Add a Business Number or 2nd Phone Line to Your iPhone
Free
Comprehensive Overview of eVoice for iPhone
iOS