Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Square - Square helps millions of sellers run their business-from secure credit card processing to point of sale solutions. Get paid faster with Square. Sign up today!
Roundcube - Web-based IMAP email client
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
QuickBooksPOS - QuickBooksPOS offer POS system software for small businesses.