
Description: Zentyal is an open source Linux server that offers a variety of network services, including DHCP, DNS, HTTP proxy, firewall, VPN, mail, viruses blocking, gateway, unified threat management, LDAP directory, Samba file server, and certification authority.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Ubuntu Server is a free, open source operating system based on Linux, designed for servers, the cloud and large-scale deployments. It has a strong community and large ecosystem of compatible software and tools.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API