A short python script to monitor filesize changes and to email the file contents to a gmail user once the file is no longer being changed. Useful for keeping track of data-generating programs and as an early alert system for data collection problems.
PyEximon is a GNOME monitor/manager for the popular MTA, Exim. It includes real-time status graphs and log updates, colored log browsing, hierarchial message lists, as well as a graphical interface to common message functions.
JEEPERS (Jason's Extra Easy to Program Email Response System) uses a POP3 email account to monitor email for command phrases in subject lines. Default commands for remote file storeage and retrival. (Nothing to do with mailing lists or mass emailing.)