The ATLAS (Automatically Tuned Linear Algebra Software) project is an ongoing research effort focusing on applying empirical techniques in order to provide portable performance. It provides C and Fortran77 interfaces to a portably efficient BLAS implementation, as well as a few routines from LAPACK.
Bubble Shooter 2 is a game mini-pack which includes Strategic, Arcade, Sniper, and Marathon games. The goal of these games is to pop all the colored bubbles that fill the board. It's a bit like Bust-a-Move or Bubblet, but with rather different and varying gameplay. It is highly addictive. There is an online contest for the best players. Versions for PalmOS 5 (hi-res) and for older devices are both available.
ChemoDose is a chemotherapy prescribing calculator for Palm OS devices. It aims to provide all common prescribing functions on a single page. Included functions are ideal body weight, body surface area (Dubois), creatinine clearance (Cockcroft), and dosing by weight, BSA, and Calvert (AUC).