I been working on a off line web base online library system on our school last 2010 and on the same year I work on a online reservation where user are able to reserve/book a room, venue for their activity, restaurant reservation, stock inventory , it's more on carting, scheduling. On 2011 I also build a online shopping cart on a motor parts, 2012 work on accounting system where the user are able to input journal entry, create/generate a report, classify item from different chart of accounts. I been using a PHP mySQL, Javascripting, jquery, apache, HTML and HTML 5, CSS for a design knows also wordpress, joomla, yii, codeigniter.