Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
Dreamweaver is a development tool for creating, publishing, and managing websites and mobile content.
Open Graph is a protocol that is used to integrate any web page into the social graph.
SPIP is a content management system written in PHP that uses one or more databases like SQL, SQLite or PostgreSQL.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.