The Linux Kernel

• The Linux Kernel Archives (Kernel.org)
• Kernel Planet
• Linux Kernel Newbies

Linux Distributions

• DistroWatch.com – Publishes popularity ranking of Linux distributions and also contains interesting news.
• Ubuntu Linux
• CentOS
• RedHat
• Rocky Linux
• AlmaLinux
• Oracle Linux
• OpenSUSE
• Debian
• Linux Mint
• Arch Linux
• Gentoo Linux
• Slackware
• Kali Linux

BSD Distributions

• FreeBSD
• OpenBSD
• NetBSD
• OPNsense

Applications of Interest

• Vim
• GNU Emacs
• The GNU Compiler Collection
• OpenSSH
• The LLVM Compiler Infrastructure
  • Clang
• Git

Database Systems

• MySQL
• PostgreSQL
• Oracle Database
• IBM DB2
• Microsoft SQL Server

Computing

• Top 500 Supercomputing Sites
• OpenCL
• CUDA