Apps similar to Trisquel include Linux Mint, which is free and open source. Other options are Ubuntu, Debian, Fedora and Arch Linux. You're spoiled for choice with Operating Systems like Trisquel: we list more than 100 alternatives for Linux, self-hosting, Windows, Mac and Chrome OS.
The AROS Research Operating System is a lightweight, efficient, and flexible desktop operating system, designed to help you make the most of your computer. It's an independent, portable and free project, aiming at being compatible with AmigaOS at the API level (like Wine...
Superb Mini Server (SMS) is a Slackware-based server distribution with web, DNS, DHCP, file, print and fax servers, iptables firewall, mail server with spam filter and anti-virus scanner, and BitTorrent station.
Visopsys (VISual OPerating SYStem) is an alternative operating system for PC-compatible computers, written “from scratch”, and developed primarily by a single hobbyist programmer since 1997.
aptosid is an operating system based on the Debian GNU/Linux unstable branch, codenamed sid, and our ISOs hold fast to the core values and the Social Contract of Debian (DFSG).
Germany
EU
Lunar Linux is a source based Linux distribution. It is built entirely by compiling source code, using custom optimizations.
Korora is an installable Fedora Remix Live USB image which aims to provide a complete out of the box experience for new users, including support for multimedia.
Custom OS Based On Debian Testing, With Media & Development Tool.
BeeFree OS is inspired from Ubuntu, Windows 7 and Linux Mint. The name is acronym for Beautiful, Effective, Efficient and Freedom.
MiniOS is a lightweight and fast Linux distribution designed for installation on a USB drive. The MiniOS project was launched in 2009 as a Linux distribution for USB drives based on Mandriva Linux. However, in 2013 it was suspended due to the liquidation of Mandriva.
Peropesis is a small-scale, minimalist, command-line-based Linux operating system. It's an incomplete system, but it's constantly being improved. Also, it is a free operating system created from a free software.
dahliaOS is a modern, secure, lightweight and responsive operating system, combining the best of GNU/Linux and Fuchsia OS.
