For Windows

 Complete install

• Rhino 5 for Windows - Evaluation - Try this full version for 90 days. After 90 days saving and plug-ins stop working, unless you buy a license.
• Rhino 5 for Windows - Latest Version - Requires a license key.
• Flamingo nXt 5 - next generation rendering for Rhino
• Brazil - advanced rendering for Rhino
• Penguin - sketch/cartoon rendering for Rhino
• Bongo 2 - design animation for Rhino (30 day eval)
• The Zoo network license manager (free)

 Service Releases

• Rhino 5 for Windows - latest bug fix patch (change log)

 Work-in-progress (WIP)

• Serengeti build - the latest work-in-progress
  (Requires a Rhino 5 license key)

 Tools

• Grasshopper - generative design tools
• Third-party plug-ins and resources
• Apps for Rhino and Grasshopper
• Labs plug-ins
• Developer Tools

 Languages

• Rhino 5 for Windows Language Pack - interface and documentation

 Archives

• Rhino 4 for Windows - full version
• Rhino 4 for Windows - latest service release patch (change log)

For Mac

 Complete install

• Rhino 5 for Mac - Evaluation - Try this full version for 90 days. After 90 days saving stops working, unless you buy a license key. Note: Rhino for Mac is NOT the same as Rhino for Windows. Details...
• Rhino 5 for Mac - Latest Version - Requires a license key.
• The Zoo network license manager (free)

 For iOS

• iRhino 3D viewer for native Rhino 3DM files on iOS devices.
  
  

Documentation

• Getting Started Resources
• Rhino for Windows User's Guide
• Rhino for Mac User's Guide
• Level 1 - Training Guide and Models
• Level 2 - Training Guide and Models
• What's new in Rhino 5 webinar series
• End-user license agreements

System Requirements

• Rhino 5 for Windows
• Rhino 5 for Mac