Official page: http://mechtilde.de/Loook
The actual version is 0.8.0.
Loook is a simple Python tool that searches for text strings in OpenOffice.org (and StarOffice 6.0 or later) files. It works under Linux, Windows and Macintosh. AND, OR and phrase searches are supported. It doesn't create an index, but searching should be fast enough unless you have really many files.
It can also search in files created by Microsoft Word (*.docx), Excel (*.xlsx) and PowerPoint (*.pptx).
If you experience problems (e.g. files not found) please start loook.py from a shell and check if there are warnings or errors.
Download Loook: Loook for Linux and Windows It has a translatable GUI.
Requirements: for Loook > 0.7: Python 3 or later
License: Loook is freely available under the GPL v2+.
It is also available as a Debian package for the next stable Release Jessie.