Slackware Linux is a complete 32-bit multitasking “UNIX-like” system. It’s currently based around the 2.6 Linux kernel series and the GNU C Library version 2.7 (libc6). It contains an easy to use installation program, extensive online documentation, and a menu-driven package system. A full installation gives you the X Window System, C/C++ development environments, Perl, networking utilities, a mail server, a news server, a web server, an ftp server, the GNU Image Manipulation Program, Mozilla Firefox, plus many more programs. Slackware Linux can run on 486 systems all the way up to the latest x86 machines (but uses -mcpu=i686 optimization for best performance on i686-class machines like the P3, P4, Duron/Athlon, and the latest multi-core x86 CPUs).
Download: Slackware 13.0