A program that allows you to do Boolean searches of log file. This is really a much more powerful GREP for windows.
You can search for lines in a file containing any combination of up to 5 search terms. You can search any combination of AND / OR. You can also filter your search.
The program allows you to search multiple files in a directory. You can specify which lines you would like to pull above and below the line you are searching for. You can do 3 layers of sub searches. Search and filter any combination to get the results you are looking for.
Now GREP on Steroids (Windows Only)