This paper introduces Silk, CELT, and BroadVoice that are available in the internet as open source voice codecs. Their voice quality is evaluated with a subjective listening test. AMR, AMR-WB, G.718, G.718B, and G.722.1C were used as stan- dardized references. In addition Skypes Silk codecs peculiar bandwidth and bitrate characteristics are examined in more detail.