There are a few applications which are good and safe for sending large files. Some contributors had used them to send me big files. Many contributors were unaware of these applications. I have only used 3 of these applications - YouSendIt, sendspace and Dropbox. There are a few more which I have tried but I feel comfortable with sendspace, even though it is a bit too technical for some of you.
It is not economic to send large files via Gmail as it will clog and lock the email very fast. To be able to operate Gmail properly, one will need to delete all the email with attached large files.
List of applications which can be used to send large files: