General terms:
* Trial version: This is a common term for a limited-time version of software that users can try before purchasing.
* Evaluation copy: Similar to a trial version, but often used for software that businesses or organizations might be considering for purchase.
* Freeware: Software that is available for free, but may have limited functionality compared to the paid version.
* Lite version: A basic version of software with limited features, often offered for free or at a discounted price.
* Sample: A small, often very basic version of software that highlights its key features.
* Prototype: A working model of software that is still under development, often used for testing and feedback.
More specific terms:
* Proof of concept (POC): A small, focused version of software that demonstrates the feasibility of a specific idea or technology.
* Beta version: A pre-release version of software that is tested by a small group of users before it is officially released.
* Alpha version: An even earlier stage of software development, where the software is still under construction and may be unstable.
The best word to use will depend on the specific context. For example, if you are talking about a free version of software that has limited functionality, "lite version" would be a good choice. If you are talking about a version of software that is designed to showcase its capabilities, "demo" or "sample" would be appropriate.