Applications

Freeware

Free

Limitless

Acquireable online as a download

Has a copyright

Not alterable

Allows copying and distribution

Sometimes crippleware

Shareware

Free

Limited

Time

Features

Number of times

Acquireable online as a download

Has a copyright

Not alterable

Does not allow copying and distribution

Sometimes crippleware

Malware (Malicious Software)

Adware

Free

Ad-sponsored

Might install cookies

Spyware

Free

Ad-sponsored

Sends information about the user to the author

Keylogger

Sends every key that you press to another computer

Trojan Horse

Sends your personal information to another computer

Worm

Replicates itself to hijack your system

Commercial Software

Requires payment

Limitless

Almost always sold in a box

Requires a registration key

Has a copyright

Not alterable

Does not allow copying and distribution

Public Domain Software

Free

Limitless

Acquireable online as a download

You can alter it

Allows copying and distribution

Integrated Software

Several applications rolled into one

Ex: Microsoft Office, Adobe Master Collection, etc.

Crippleware

It has a lack of functionality caused by a conscious effort from the manufacturer.

Used as a tactic to get users to buy the full product.