What is the type of software that is a functionally limited version of software available at no cost?

Public domain software refers to software that is not protected by copyright and is freely available for anyone to use, modify, and distribute without restrictions. Unlike shareware, public domain software does not involve limited functionality or trial versions; instead, it is fully accessible to the public for various purposes.

Closed-source software, also known as proprietary software, is developed by a specific entity and the source code is not made available to the public. Users typically need to purchase a license to use closed-source software, and the code is not open for modification or redistribution. This model contrasts with shareware, which allows users to access a partial version at no cost.

Freeware is software that is available for free, similar to shareware in terms of cost. However, freeware differs in that it typically does not have limitations on functionality or features. Users can use freeware without paying any fees, but the software may not offer the same level of customization or support as paid versions.