Copyright

A collection of rights granted to an author's work.

Public Domain

Isn’t protected by copyright laws; too old, created with public money, author donated, etc.

Freeware

Copyrighted work that you can copy and give away for free.

Shareware

Copyrighted work that you can copy and give away for free for a limited time.

All Rights Reserved

Allows the purchaser to use the software according to the details in the licence agreement.

Open Source

Software that includes the source code with the idea that someone can improve it.