Alternativer til Project5 til Gmail med kommerciel licens

• Gmail
  Alle platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 Apple Watch iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari Internet Explorer PHP JavaScript BSD Windows Mobile Wordpress Slack Microsoft Office Outlook Electron / Atom Shell Chrome Ruby Discord Microsoft Office 365 Gmail Joomla C++ Apache HTTP Server .NET Framework MySQL Community Edition AngularJS Redmine Cloudron Microsoft Azure Go (Programming Language) MariaDB Ruby on Rails Google Apps Jira Microsoft SQL Server Microsoft SharePoint Zapier PostgreSQL VirtualBox ASP.NET MVC Confluence Kirby
• Kommerciel licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens