Similar to Tcl

• 

  Openbox

  Openbox
  
• 

  OpenBSD

  OpenBSD
  
• 

  OpenLDAP

  OpenLDAP
  
• 

  OpenVPN

  OpenVPN
  
• 

  OpenVZ

  OpenVZ
  
• 

  Opkg

  
• 

  PARI/GP

  PARI/GP
  
• 

  Pcap

  Pcap
  
• 

  PCSX

  
• 

  PhotoRec

  PhotoRec
  
• 

  Pluma

  Pluma (text editor)
  
• 

  Polkit

  Polkit
  
• 

  PortAudio

  PortAudio
  
• 

  Privoxy

  Privoxy
  
• 

  ProFTPD

  ProFTPD
  
• 

  PSPP

  PSPP
  
• 

  PulseAudio

  PulseAudio
  
• 

  Qmail

  Qmail
  
• 

  Rdesktop

  Rdesktop
  
• 

  ReactOS

  ReactOS
  
• 

  RecordMyDesktop

  RecordMyDesktop
  
• 

  Redshift

  Redshift (software)
  
• 

  KornShell

  KornShell
  
• 

  Rsync

  Rsync
  
• 

  Sbase

  Sbase
  
• 

  Scalasca

  Scalasca
  ▲1 trends

  
• 

  Security-Enhanced Linux

  Security-Enhanced Linux
  
• 

  Sendmail

  Sendmail