Operating Systems           Web Browsers           Graphic Design, Animation & 3D Simulation           Photo & Image Editing, Organizing, Galleries           Multimedia Players, Mixers, Rippers           Digital Audio Studio & Editing           Digital Video Studio & Editing           Documents & Word Processing           Spreadsheets, Stats, Science & Engineering           Email, Chat, IM, Web Conferencing, Telephony           Education & Edutainment           Virtualization           Interactive Presentations           Building A Custom Operating System!           Database Engines, Application Frameworks & Languages           FTP, HTTP and SSH instruments           Content Management Systems (CMS)           Desktop Environments & Window Managers           Text Editors & IDEs           eCommerce & Business Enterprise           Network Discovery & Monitoring           Print, Scan, Copy & Fax Tools           Security, Firewalls, Privacy & Data Integrity           Source Code Management (SCM) & Versioning           Assistive Technologies           Open-Source Gaming           Everything Else