Users of the registered version of the iPhone Backup Extractor are able to use its function to automatically export their data to CSV for easy access. Non-registered users cannot, and will find that they need to manipulate Apple's .sqlite3, .sqllitedb and .db files.
Both of these files are SQLite 3 databases. Users wishing to extract data from these files will need a SQLite database client.
How can I work with SQLite databases?
Users might want to try either of these two free applications: