A one-command, super-simple diary or journal to keep track of things.
I needed this simple tool because I had an itch to scratch. I've tried a couple of different methods for keeping a diary and quite simply I never keep to it. Often the reason is that I'm in a hurry and need to write something down without worrying about loading something up, without worrying about formatting and more. I just literally want to put something down as quickly as a post-it note and be able to find it again later.
The intention for this script is that you can simply go to the command line, type grnl followed by your entry text and then append that to a single text file, tagged with the date. This file can then be referred back to. I have other tools for more formal documentation and time recording and my workflow is to record notes with grnl and transfer the detail to these other tools when I make time for it.
I like org-mode, I really do, but as my documentation, calendar and other information go into other tools I can't really justify the weight of learning and using org-mode, only to transfer those details to another application at a later date. In a nutshell though, I still want something that is lightweight that can be used quickly, from anywhere and without really thinking about it.