What type of software is available for free but encourages users to make voluntary monetary contributions?

The correct answer is shareware. Shareware refers to software that is distributed for free but comes with the expectation that users will make a voluntary payment for continued use or to access additional features. This model allows users to try the software before making a financial commitment, encouraging them to support the developers if they find the software helpful or valuable. Shareware often includes limitations, such as a trial period or restricted functionality, which can incentivize users to contribute financially to unlock the full version.

Freeware, on the other hand, is software that is available for free without any expectation of payment. Open source software is distributed with its source code, allowing users to modify and distribute it freely, while commercial software typically requires users to pay for a license right from the start. Understanding the nuances among these types of software helps clarify the particular characteristics of shareware and why it operates on a model of voluntary contributions.