Linphone, in particular, is widely considered one of the most famous open source softphones in the world, fully SIP‑based for all calling, presence, and IM features.
Zoiper is a popular cross-platform VoIP softphone designed to let you make voice and video calls through your own SIP or IAX provider. While newer versions like are now standard, many users still seek out older, lightweight builds like Zoiper 3.15 for their low resource consumption and specific feature sets. Where to Find the Zoiper 3.15 Free Download zoiper 315 free download top
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Version 3 was the peak of the classic interface. It is known for rock-solid stability. It supports the standard codecs out of the box and often supports G.729 (depending on the specific build), which is essential for users with limited bandwidth. Linphone, in particular, is widely considered one of
The free "Lite" version of Zoiper 3.15 provides basic calling capabilities, while advanced business tools require a paid license. Free Version Premium (Biz/Pro) Codecs Basic (a-law, u-law, GSM) Adds G.729, H.264 (Video) Call Transfer Not Available Conferencing Not Available Recording Not Available CRM Integration Full (Outlook, LDAP) Download and Installation Tips To get Zoiper 3.15 or a similar "Classic" version safely: Where to Find the Zoiper 3
This is likely a false positive. Upload the downloaded file to VirusTotal.com. If most scanners report it clean, report the issue to your antivirus provider and temporarily add Zoiper to the ignore list.
The safest way to get Zoiper is directly from the developer. The current flagship version is Zoiper 5 , but they maintain access to older builds for compatibility: