📝Open source makes systems more extensible

Access to the source code allows small modifications without re-implementing the whole application from scratch.

Open source promotes reuse. Creating a spin-off in open source is called “Fork.”


  • Vim / Neovim
  • XEmacs was a fork of Emacs but (I believe) contributed many ideas back into Emacs itself
  • Emacs (What makes Emacs extensible?)
  • Linux distros

    • Everybody can create a Linux distro and there are tons of them
  • ErgoDox and its variants
  • ffmpeg as an extensible media pipeline


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