Softphone Software

Bitrix24
  349
100% free CRM, collaboration and communication tool suite
3CX
  175
Hosted PBX with CRM integration and mobile apps
Zoiper
  58
Cross-platform VoIP softphone dialer for SIP and IAX systems
VirtualPBX
  21
Trusted VoIP for any office, anywhere.
RingOver
  6
100% cloud phone for startups and SMBs
eVoice
  5
Small business phone software