Contact Converter is capable of converting multiple vcard files into single csv file which can be imported into google contacts. It is also possible to split one csv file into multiple vcard files.
You can select multiple vcard files or entire folder which contains the files. Before the converted file is saved, you have an option to review the generated csv file and to modify it: delete rows and columns, rename columns, etc.
Contact converter is completely free, without any limitations.
It is well designed and easy to use and supports google csv format for contacts.
The program works all on modern Windows OSes: Windows XP, Windows Vista, Windows 7, Windows 8. It supports both x86 and x64 systems.
A user who wants to transfer contacts from his old phone to the smartphone.