Fun fact: the US Social Security Administration still maintains and distributes a Mac PowerPlant app, built with CodeWarrior as a PPC binary (which of course doesn't work on 10.7+)!
https://www.ssa.gov/OACT/anypia/anypia.html
I ported it to Xcode, keep the code on GitHub, and maintain an Intel build. Haven't been able to get the attention of anyone at the SSA though.