X-Lite 3.0 by CounterPath is a highly popular softphone that uses SIP protocol and is available for free download. It is the top choice for users in the market.
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Our system has scanned the download for viruses, and we suggest that you also check the files before installation. The version of Counterpath you are about to download is 2.0, and the download will be provided as is, with no modifications or changes made on our end.