Cron, SMS/Email/Web notifier and reminder, SMS gateway with delivery reports, API etc. There was also integration with Help Desk, Paypal IPN, Ajax chat.
Loads signal, analyzes it (detects annotations, QRS complexes, P & T waves - detection based on Wavelet), allows. Press play and it starts animation.
Metal Calculator Plugin allows you to sell precious metals on your Wordpress website. http://wordpress-test-2023.infinityfreeapp.com/?page_id=30
PHP, Javascript, CSS calendar for Zamger - information system for students at Faculty of Electrical Engineering in Sarajevo. It was in use for a few years.
Developed a simple website for a hotel in Paris. You can preview how it looks here: http://webtests.42web.io/hotel/ It contains a very nice slider and menus.