DotBASIC plus is a BASIC extension for the Commodore C64 that will give you more than 100 new BASIC commands. This program was developed by Dave Moorman. The 8-Bit Central web page has now permission from Dave to release DotBASIC plus as freeware. DotBASIC plus can be downloaded as a d81 or four d64 images and a user manual (80 pages, pdf) is included.