Alternativen zu sevDesk für Software as a Service (SaaS) mit Open Source-Lizenz

• Software as a Service (SaaS)
  Alle Plattformen Windows Mac Linux Android iPhone Windows Phone Apple Watch iPad Android Tablet Kindle Fire Web Self-Hosted Software as a Service (SaaS) PHP BSD Slack npm
• Open Source Lizenz
  Beliebige Lizen Freie Lizenz Open Source Lizenz Kommerzielle Lizenz