A day logger and time tracking program
BSEditor: RedBook is an interactive Ruby script able to:

* Log your daily activities onto a YAML file (multiple log files supported).
* Export a set of activities to a txt, csv or yml file.
* Display activities matching a specific string (Regexp supported), tags (with boolean operators), or time Frame.
* Calculate the time elapsed Between two or more logged activities.
* Calculate the number, the duration, the average and total time spent on a set of activities matching user-specified criteria.
* Update and delete logged activities.
* Backup, archive and restore log files.
* Evaluate arbitrary Ruby code, for example to act as a emergency calculator when needed.

Additionally, this script supports:

* International characters and character encoding conversions.
* Completion for directives and tags.
* Custom key bindings.
* User-defined variables you can free download RedBook for Linux 0.5.0 now.