This is a small utility that displays the amount of memory used and remaining as percentages. I'm told that when the memory used reaches 85% the calculator starts to misbehave.
A collection of music files, two of which are written by Colin Croft and the others by unknown programmers. Songs are: Flintstones, Dumped Again, Blister in the Sun, Mary Had a Little Lamb, Nick's Song, Happy Birthday, Charge, Funeral March, Come As You Are, The First Nowell, Happy Birthday (II), Star Wars, Hymn 389.
Lets the HP 39/40/48/49(+) connect to the Internet at 9600bps, using a mere modem. Includes some mail and news posters, and a mail fetcher. Also appears to work over IrDA on the 49g+.