Based on our record, NethServer seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Check out Nethserver - https://nethserver.org/. Source: over 2 years ago
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Zentyal - Linux directory, domain, mail, gateway and infrastructure server for SMBs.
Roundcube - Web-based IMAP email client
ClearOS - A very good alternative for Windows Server, for free
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more