- noun software which is available free to try, but if kept, the user is expected to pay a fee to the writer (often confused with public domain software which is completely free)
- Software that is distributed at no cost for a stated trial period. Once this time, such as 30 or 90 days, has passed, nag screens may start to appear, or access to the program or given features may become unavailable unless a payment is made. Frequently, after payment and registration, a user in entitled to technical support, enhanced features, and other benefits.
- noun software which is subject to copyright restrictions, but is available free of charge for a trial period prior to purchase