Yes.
These are the option I am aware of:
EDIT: as of May 6, 2010
1) GCCalendar
2) http://github.com/klazuka/Kal
3) http://code.google.com/p/iphonecal (needs to be customized – easily – to change text from chinese to english)
4) Commercial: http://nrg.com.bd/blog/archives/36 but the look & feel of the previous ones is much, much better and they are free, if you can comply with their licenses.
Hope this helps.