PC file renaming system

[GavinPearson]

Please can you help. I have combined the various digital photo files we have on one computer and would like to rename the files so they are in a common format based on the date they are taken.

So some files might say IMG1234.jpg, some may say 2014_08_29_12345678.jpg etc, I would like them to be renamed based on the date and time they were taken, much like the second example.

Is there a program that I can buy that does this please?

Going one step further, is there a utility that could take all the files created on a particular day, put them in a folder and give that folder the appropriate date?

Any guidance would be much appreciated.

Thanks.

[GavinPearson]

Thanks for the advice guys, much appreciated.