Alternativ till Collabtive för Ruby med kommersiell licens

• Ruby
  Alla plattformar Windows Mac Linux Chrome OS Android iPhone Apple Watch iPad Android Tablet Windows S Web Self-Hosted Software as a Service (SaaS) PHP Chrome Ruby Thunderbird MySQL Community Edition Cloudron MariaDB Ruby on Rails Microsoft SQL Server PostgreSQL
• Kommersiell licens
  Eventuell licens Gratis licens Open Source-licens Kommersiell licens