There is a nice tool which allows you to autocomplete email addresses in mutt by making use of the contacts stored in the evolution data server of the GNOME desktop. The small helper programme was originally written by Sertac Yildiz and was updated recently to the latest EDS API by Paul W. Frields.
Announce todo.txt open action
The script adds a new action to todo.sh, the todo.txt command line client, which allows to open documents referenced in a todo item. If more than one document is available a small menu will be shown. This allows you to easily acces documents that are required to accomplish the task.
To improve my task management workflow with the todo.txt command line tool I wrote a small helper called mutt2todotxt. It converts a mail from mutt into a todo.txt item and adds it to the list of open items. It will automatically include the sender, subject, labels and the unique message id to the todo item.