Similar to Autoconf

• 

  GNAT

  GNAT
  
• 

  GnuCash

  GnuCash
  
• 

  GNU social

  GNU social
  
• 

  Texinfo

  Texinfo
  
• 

  Bison

  GNU Bison
  
• 

  Bazaar

  GNU Bazaar
  
• 

  Bash

  Bash (Unix shell)
  
• 

  Less

  Less (Unix)