Is there a FREE tool like File Joiner,a tool that binds files (binary or whatever) into a single standalone executable ?

Do you mean add DLL files that can also be loaded transparently by the exe, or simple arbitrary data files that can be dropped to disk when the program runs?

Please post the URL to this "File Joiner" that you are referring to, since it is a too unspecific name to reliably be googled for.

Not only DLLS, any file like .DOC, for example.

Here is the link: http://www.file-joiner.com/

You could code one yourself in minutes. Simply write two apps. The first is a stub executable that extracts all resources in that same executable and writes them to disk (perhaps looking for a manifest file so it knows what to do for each resource). The second is a GUI front end that adds and removes resources from a copy of the first stub executable.

Everything you need is here:
http://www.codeproject.com/KB/winsdk/binaryresources.aspx

As Silver says, this is a very simple task.

The considerably harder problem I mentioned above can be done with the following (non-free) excellent program though:

http://www.woodmann.com/collaborative/tools/PEBundle