Slackware is the longest-running distribution of the Linux operating system. Slackware offers a stable and secure version of Linux that is perfect for home, office, or educational use. Slackware is easy for beginners to install, but contains all the advanced features required by the experienced UNIX power-user.
Pocket Linux is an almost minimal, one floppy linux system designed to quickly convert PC workstation into secure linux-based workstation using ssh to connect to remote host (other networking clients are also supported). It supports bootp for determining host IP and other network parameters (there's also manual configuration possible, but bootp is recommended). In addition to workstations equipped with a network card (ethernet or arcnet), you can also use Pocket Linux on a PC equipped with a modem. Modem is automatically detected and then PPP connection is made.
The OpenBSD project produces a free, multi-platform 4.4BSD-based UNIX-like operating system. Its goals emphasize portability, standardization, correctness, proactive security, and integrated cryptography. OpenBSD supports binary emulation of most programs from SVR4 (Solaris), FreeBSD, Linux, BSD/OS, SunOS, and HP-UX.
muLinux is a minimalistic, but mostly complete, script-based Linux distribution that fits on a single 1722k floppy. X11, GCC, VNC, and TCL addons are supported on additional floppies. It includes many basic system functions, such as PPP and Ethernet support, mail processing, NFS, Samba, FTP, IRC Finger, ipfw, etc.
Red Hat Linux is a versatile distribution that can be a server or desktop at work or at home. Everything you need to set Red Hat Linux up as a Web server, email server, DNS server, news server, and more is included, along with software for email, browsers, publishing, calendars, Internet tools, and much more.