[$] Old-school calendaring at the command line with Remind
Remind is a command-line calendar and alarm program, with an optional Tk-based graphical interface, for Linux and Unix-like operating systems. It has its own scripting language that allows users to create reminders that are difficult (if not impossible) to specify in other calendaring programs. It is wholly unsuitable for use in corporate environments that require calendar sharing and exchanging…
We haven't written up this one. LWN has the full story — the link below goes straight to it.