There are tonnes of times when you open the camera cover to take pictures and then forget to close it once you are done. The result is that the camera lens keeps accumulating dust and that is something no N900 owner wants.
Enter ‘Lens Cover Reminder’ by nicolai that notifies you of an open lens cover by displaying a small icon in the status bar, as soon as you close the cover it vanishes. In cases where you somehow happen to ignore it, the phone will vibrate when you use the lock switch to lock the keyboard and screen.
Simple yet effective and just another example of the community contributing to this open source behmoth. The application is available in extras-devel, if you haven’t enabled it, here’s how to do it, the usual warning about software from extras-devel applies.