Zoiper - Cross-platform VoIP softphone dialer for SIP and IAX systems

Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.

Sipdroid - Free and open-source SIP/VoIP Client

Nubo - A self-hosted file sharing application in Haskell.

Linphone - Linphone is an internet phone or Voice Over IP phone (VoIP).

Filecamp - Digital Asset Management & Online Proofing tools beautifully integrated, into one secure and cost-effective solution. Manage all your digital marketing assets from your own good-looking, easy-to-use spot in the cloud. Unlimited users in all plans!