Software licenses 
  Beerware
  Free
  Free and open source software
  Freely redistributable software
  Open-source software
  Proprietary software
  Public domain software
Revenue models 
  Adware
  Donationware
  Freemium
  Freeware
  Commercial software
  Nagware
  Postcardware
  Shareware
Delivery methods 
  Digital distribution 
  List of mobile software distribution platforms
  On-premises software
  Pre-installed software
  Product bundling
  Software as a service
  Software plus services
Scams 
  Scareware
  Malware
End of software life cycle 
  Abandonware