A simple structure and easy to install BBS script. You can turn the HTML tags on or off by setting the variables inside the script. The script also supports footer and header, so you can make every post look like rest of your pages.
Most scripts are free or open source. But some have the full source code available for download yet itīs required to have permission to use them and most often the price will be listed. If there is a script license e.g. GNU or GPL then it will also be listed.