tSIP
tomeko.net/software: SIP client for Windows.
19 Alternatives To tSIP
Beekeeper
The #1 All-in-One communication & productivity platform used for reaching and connecting every individual in an organization.
Blink
Blink is a team and employee app, with a Feed, Chat and Hub (for documents, links, files).
Bria
VoIP and video calling, messaging and presence - all from your computer desktop with the award-winning Bria 5 softphone client.
Ekiga
Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for…
Jitsi
Open-source video calling and chat platform.
JustCall
JustCall is a program that allows companies to use a cloud based call service with several important features that make the program perfectly suited for sales teams as well as support teams.
Kopete
Kopete is an instant messenger supporting AIM, ICQ, MSN, Yahoo, Jabber, IRC, Gadu-Gadu, Novell…
LINE
LINE is a Japanese proprietary application for instant messaging on smartphones and PCs.
Phoner
Softphone for VoIP, CAPI und TAPI.
RevenueWell
RevenueWell provides automated dental practice marketing and patient communications suite for dentists.
Slack
A messaging app for teams who see through the Earth!
Telephone
Telephone is a VoIP program which allows you to make phone calls over the internet.
Voiceably
Voiceably is the provider of a local phone number to establish an independent cloud call center or business phone system.
Voxox CloudPhone
Get a local or toll-free business number that automatically answers, routes and transfers calls, plus other professional business phone services.
Wire
Private & Secure Messenger
X-Lite
The X-Lite softphone from CounterPath. Try out our fully-loaded Bria desktop client including voice and video call, messaging and presence or download X-Lite for try to test SIP softphone features.
YakYak
Desktop client for Google Hangouts
Zoiper
Cross-platform VoIP softphone dialer for SIP and IAX systems