Disk Cleanup will help you find fast all duplicate files in a folder and its sub folders. The applications will compare the content of your files so it will find duplicates even if they are using different file names. It uses fast binary comparison algorithm and has internal preview supporting a lot of image, video, music and text file formats. You can also preview the files in binary mode.
Scan multiple drives for duplicates files. Find and remove duplicate files of ANY type and free up hard disk space. The powerful search engine enables you to find duplicates with the following file criteria: name, extension, content, date, attributes
Instant File Name Search
Instant File Name Search (IFNS) is a fast, free and easy to use search tool. Instantly search files by name or wildcards on your computer or local network.
Finds regular expr in text/HTML/XML files, color-coding the output Global find+replace with option to confirm each replace and roll back changes. Click an output line to activate built-in editor to open the file and highlight the expr. on that line
Deductus disk catalog
Deductus is fast disk catalog and personal full-text search engine with explorer-like interface.
Quickly search through large numbers of files on your PC or network using powerful text patterns to find exactly the information you want. Search and replace with plain text or regular expressions to maintain web sites, source code, reports, ...