- Database: mainly MySQL , but MSSQL or PostSQL are also possible.
Examples where databases can be used :

• product and stock management for a store
• a reservation system for a restaurant.
• management of customers and premises for a real estate company
• ordering module for a website

- Scripting :
* client side: Javascript
* server side: php, jsp, asp, perl, java
Examples where scripting can be used:

• different user levels, user authentication
• creating profiles and store them in a DB
• posting newsitems + reactions
• dynamically posting albums, photo's + rescaling them
• formhandling, storing data in DB and access this data
• form validation (client or server side)
• generating mailinglists and sending mail automatically