Here is a feature packed VCF contact/address book like program written using Pelles C.
In addition to using Pelles C it incorporates code from David MacDermots Pelles C MakeExcelDemo to export to Excel BIFF 2.1 files. It also uses fGdiPlusFlat.h header created by Frankie for GDIPlus under C.
The package is too big to add as an attachment here (Maybe Pelles Web needs to increase the 1MB limit to 2-3MB?) so it can be found at
https://sourceforge.net/projects/vcardz/ or direct download at
https://sourceforge.net/projects/vcardz/files/latest/download unzip and run nothing installed, no registry entries. Can even be run from a USB drive.
Over
9000 10,005 12,535 15730 downloads across
145 147 151 158 countries but not very much feedback. I know the esteemed Pelles C followers are not shy about feedback.

Missing features, errors, etc. all welcome, just don't beat me up about my linguine code style ;(
Some features I'm proud of creating:
Ability to pin a filename and directory name to each MRU list so that they are always available even if the list is cleared or adds exceed entries causing rollover. Wouldn't mind if Pelle added this to the IDE. Very handy.
ODF spreadsheet export in two layouts. ODS can be opened by LibreOffice and EXCEL 2007 and newer.
Resizing the window, it does not use the Pelles Resizer lib but I think works fairly well. Try it with Auto Font turned on too, even full screen.
Huge help file, including context sensitive help. Help file is bigger than the exe

Hope it is useful,
John Z