MicroSIP - MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack.
Officevibe - Officevibe is an employee survey platform with the mission of improving company culture. Measure and improve your culture in less than 5 minutes per month, with our simple surveys.
Linphone - Linphone is an internet phone or Voice Over IP phone (VoIP).
Kudos - Kudos is the simple and easy to use employee recognition software that enhances employee engagement and team communication.
tSIP - tomeko.net/software: SIP client for Windows.
Fond - Fond employee engagement platform helps companies increase employee happiness with recognition, rewards, perks and survey programs to maximize impact..