Some shareware versions have reminders which can be a nuisence unless you pay up. Remember, shareware is not free , so please pay the small fee if you are making good use of the software. This encourages others to develop new titles. Freeware is less common than shareware and as the name suggests, it's free. Many demo versions are set to expire after a certain number of uses or after a period of days from the first use.
Some demos offer all the capabilities of the full version.
The software available for download on the Internet is usually compressed so as to reduce storage space and download time. In order to use the software once you have downloaded it, you will need a file decompression program to expand the software file. There are many different formats depending on which operating is being used. Some Tips Downloading can take time depending on the size of the program. Some sites give size details.