Zoiper - Free VoIP SIP softphone dialer with voice, video and instant messaging :: Zoiper
SIP Softphone — Software phone — Software for call centers, telemarketing, phone surveys...
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SessionTalk SIP Softphone by SessionTalk Ltd (iOS, 日本) - SearchMan アプリマーケットデータ
Zoiper - Free VoIP SIP softphone dialer with voice, video and instant messaging :: Zoiper
VoIP/SIP client (softphone) for Windows
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CallOne VoIP Softphone - Microsoft Edge Addons
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Express Talk (SIP softphone)
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IP Phone - SIP softphone for Windows
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