I use iCal for my ticklers. (either as "All day" items, or To-Do items due on particular days.)
For my GTD lists I use a program called "Notebook" by Circus Ponies (
http://www.circusponies.com)
This program creates a virtual "notebook" where you can type in lists, and organize them. You can also import items from other programs (text, e-mail, pictures, documents) via drag & drop, or it's "Clipping" service. This makes it easy to import e-mails or stuff found on the web, into the lists, allowing you to keep your e-mail's in box truly an "in box" and not another place to accumulate "stuff" in.
It has many other neat features that have no bearing on GTD, but if you're interested go to their website and take a look (there's some good online demonstrations there).
I know you only wanted to use the "plain vanilla" programs, but I've found that the $50 spent was well invested.