One day I hope to explain how to do that with PSTricks, and to release the macros or programs to generate easily most of these graphics...
1 - `pst-cal': Calendars

In summer of 1998, I wrote a nearly complete and sophisticate solution for events management (allowing dates in numerical or alphanumeric form, dates and times in american or european formats, multi-languages interface, etc.).
In summer of 2001, I made a huge step in integration of all previous material in a coherent package, started to write the documentation and to build a complete .dtx file. Nevertheless, this is not finished at all and unfortunately frozen still 2001... But I update, as usual, the three dimensional calendars for the new year 2004.
2004 cube calendar
(american)
2004 cube calendar
(danish)
2004 cube calendar
(english)
2004 cube calendar
(french)
2004 cube calendar
(german)
2004 cube calendar
(greek)
2004 cube calendar
(italian)
2004 cube calendar
(spanish)
2 - Three dimensional framed boxesCurrent version is 1.0, from February 25, 2002
Before it release on CTAN, the source is available here (and require also the file pst-key.tex available on CTAN/pstricks/contrib/misc).
Its documentation is both the reference manual and the user's guide.
3 - Others