Free trials vary by product. Some free trials require purchase information upfront and will convert to a paid subscription if they are not canceled before the trial period expires. Other free trials allow you to download the product and use it for a specific period of time, and they simply stop working when that trial period expires.
Most people download the trials by signing up for the free level of CC membership and using the Creative Cloud Desktop app to select and download any or all of these products, although with the direct links below, no membership is required to access the free trials. 2b1af7f3a8