Calamari - Calamari helps organizations, companies, and enterprises to manage their human resources in an easy and compliant way by delivering modern and easy-to-use time tracking and attendance management tools.
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Sage HR - Sage HR is a one-stop shop for your HR management needs. Your HR - simplified!
Roundcube - Web-based IMAP email client
TimeOffManager - TimeOffManager.com provides a fully automated online system for tracking and managing employee absence, leave, paid time-off and attendance.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.