iSpring Free - iSpring Free is a free eLearning authoring tool that allows you to create responsive courses and quizzes right in PowerPoint and convert them to HTML5 or SCORM.
Roundcube - Web-based IMAP email client
H5P - H5P is a free and open-source content collaboration framework based on JavaScript.
HEY - Email at its best, new from Basecamp.
Articulate Storyline - Articulate Storyline is a program that allows you to create interactive courses of any kind with templates and a simple system. There is a free trial offered so that you can determine whether you want to use the program further or not.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.