Strigi is a fast and light desktop search engine. It can handle a large range of file formats such as emails, office documents, media files, and file archives. It can index files that are embedded in other files. This means email attachments and files in zip files are searchable as if they were normal files on your harddisk. Strigi is normally run as a background daemon that can be accessed by many other programs at once. In addition to the daemon, Strigi comes with powerful replacements for the popular unix commands "find" and "grep". These are called "deepfind" and "deepgrep" and can search inside files just like the strigi daemon can.