I use the UML style (as used in java).
Capital letter for the beginning of each word in the name of a class or struct, eg: "MyClassName".
All class members have lowercase first word then upper for every following one, eg "myMethodName(), myVariable"
All constants are uppercase.
All elemental types (and in C/C++ typedefs thereof) are lowercase, eg "int32, uint32".
AmigaOS has its own standards for stuff, but my code always sits a layer above so I never see it outside of some implementation.
