Similar Products to Ubuntu

Open Source

• Fedora- very similar to Ubuntu. It is the free version of Red Hat server software
  
• Debian-Ubuntu is actually a flavor of Debian. Debian is really made for server applications but is stil a Linux-based open source Operating System
  
• OpenSolaris-open source version of Solaris, a piece of proprietary software by Sun Microsystems. Can only be run by Sun machines
  

Proprietary

• Windows Vista-the newest in the most used Windows OS line. Look and feel has changed significantly since Windows 2007.
  
• Mac OS Snow Leopard-new and advanced, fast, solid, secure, and expensive