Pinboard (duckworth) https://pinboard.in/u:duckworth/public/ recent bookmarks from duckworth iSoftPhone 2011-10-07T16:10:51+00:00 http://www.call4mac.com/ duckworthmac software voip https://pinboard.in/ https://pinboard.in/u:duckworth/b:f5e1b3e3414c/ Twilio Cloud Communications: Web Service API for building Voice and SMS Applications 2010-08-24T15:14:00+00:00 http://www.twilio.com/ duckworthvoice telephony sms application webservices voip https://pinboard.in/u:duckworth/b:43c4573b428a/ 3CX Phone System - software based VoIP IP PBX / PABX for Windows 2009-08-12T18:18:14+00:00 http://www.3cx.com/ duckworthfree voip pbx sip windows software https://pinboard.in/u:duckworth/b:a1e509c0e0ba/