Fileseek -

Can search for specific strings of text inside almost any kind of file.

Searches your hard drive in real-time without hogging your system resources in the background. FileSeek

You can right-click any folder in Windows Explorer and instantly open FileSeek mapped to that exact directory. Can search for specific strings of text inside

FileSeek can be easily run as a portable application, making it easy to take between machines on a USB drive. FileSeek