Power DA - Green Dragon Software.com
http://www.greendragonsoftware.com/software/palm/powerda
"Power DA is a Desk Accessory launcher for Palm OS 5. Desk Accessories are useful little applications that can be opened and used while you are in another program."
ToDo DA - SpaWare
http://ogin.net/spaware/tododa/index_e.html
daMemoPad
http://www.jade.dti.ne.jp/~imazeki/palm/damepd.html
Memo Pad Desk Accessory. Text is all in Japanese, but scroll to the bottom for screenshots.