It is very common that the accidental deletion or formatting of flash drive, memory cards or files from PC. Most of the data recover softwares are too costly to afford for a common people. Here you can use the free version of Easeus Data recovery wizard to recover the accidental deleted or formatted files. 
This is a powerful software with almost all features of a premium data recovery software. It solves all data loss problems – recover files emptied from Recycle Bin, or lost due to software crash, formatted or damaged hard drive, virus attack, lost partition and other unknown reasons under Windows 2000 / XP / 2003 / Vista / 2008 / 7. It recovers data from formatted partitions with original file names and storage paths. Moreover, the free data recovery software works well with dynamic disk, RAID and Linux file system.
User friendly GUI makes data recovery in few mouse clicks. Through the advanced search feature you can refine the file types and make the search and recover option faster. EASEUS Data Recovery Wizard Free Edition can recover files not only from FAT, NTFS partitions, but also from EXT2 and EXT3 partition under Windows Operating Systems.
Limitation: With this free edition you can recover only 1GB of data but it is an economical solution for limited usage such as recovering the deleted photos from memory cards or flash drives.
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Good data recovery software, it works as the following article writes:
free and easy recovery software
http://www.easeus.com/resource/free-easy-recovery.htm
User friendly GUI makes data recovery in few mouse clicks. Through the advanced search feature you can refine the file types and make the search and recover option faster.