To the users who forgot their excel sheet password, I have a perfect solution for your problem. You guys can try this very effective tool of password recovery, known as eSoftTools Excel Password Recovery Software. This tool comes with a free demo version which shows the first three letters of your lost password in less time. It gives an accurate password recovery with full data protection. To recover the passwords this tool has three very effective techniques like - Brute Force, Mask Attack, and Dictionary Attack. 

Get More - Unprotect Excel Sheet without password