Shareware is software that is distributed free on a trial basis with the understanding that the user may need or want to pay for it later. Some software developers offer a shareware version of their program with a built-in expiration date (e.g. after 30 days, the user can no longer get access to the program).

The most common way to get shareware is to download it from the internet. 
There is no shortage of sites devoted to shareware, where it is usually categorized according to function, and sometimes reviewed or graded.

Shareware is often found on the cover disks of computer magazines. It can be installed on your computer from the CD ROM or DVD enclosed with the magazine. Commonly, a software manufacturer includes an older version of a software application following the launch of the newest version. Also, companies often “give away” up-to-date versions of software with some of its functionality restricted, or that can only be used a certain number of times or for a limited amount of time.

Compilations of shareware can often be found for sale on CD ROM or DVD in software retailers.

The software may be offered on an “honour” system, i.e. the user receives a fully working version of the program and is requested to pay a fee to the author(s) if they like it and want to continue using it. Usually, the user will then be entitled to technical support and upgrades free of charge. Sometimes the user will receive a newer/more advanced version of the program once they have paid for it.

The software may be offered as a fully working program which will cease to function after a certain number of uses or after a certain period of time, e.g. thirty days. By paying the registration fee, the user will receive a code to unlock the program from the producer(s).

The software may be offered with certain functions not operational. This may include an inability to save or print, or printed output may include a water mark or other symbol.