Alternativer til Sipdroid til Self-Hosted med open source-licens

• Self-Hosted
  Alle platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Apple Watch Android Wear iPad Android Tablet Windows S Web Self-Hosted Firefox BSD PortableApps.com Chrome
• Open Source-licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens