Alternativas ao Tiggr para Software as a Service (SaaS) com licença de código aberto

• Software as a Service (SaaS)
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone iPad Web Self-Hosted Software as a Service (SaaS) Slack Microsoft Office Word Google Drive Google Drive - Docs Google Apps Trello Microsoft Office Suite Google Drive - Sheets Atlassian Stash Google App Engine
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial