Technical analysis and design :

Dia : open source diagram and UML editor for Linux and Windows

Database conception (MERISE) : Fabforce DBDesigner, MySQL, SQLite

Project management :

Open workbench (similar to MS Project), and projity (other MS Project clone)

Text editors : NVU / Kompozer, Microsoft XML notepad, XMLSpear, PSPad

Windows office software : open office

Windows scripting tool : autoit (gratis & open source)

Linux :

- Favorite linux distribution : OpenSuse with KDE

Open source PHP applications :

SugarCRM : The famous CRM solution

WordPress : One of the best blog applications

Drupal : Open source Content Management System (CMS)

Dolibarr : Open source ERP for small companies

Hosted web applications :

Yahoo.com, Google, Gmail, Google Map, ThinkFree (office document editor), http://www.myquire.com (project management)…

Misc. software :

Games : War Rock, Nexuiz (open source First Person Shooter), open arena …

P2P and File transfer tools : Limewire (P2P), BitComet, FileZilla (FTP client)

Web browser : Google Chrome, flock, Firefox

ebook reader : mobipocket

Windows XP tools : VirtualWin (virtual desktops), webflash (screensaver), Utool, Startup control Planel

Windows system tools : VirtualBox, VMWare, HDGraph, 7-Zip, RealVNC, Easeus Partition Manager, CCleaner, PrimoPDF, Easysync

Multimedia edition : Inkscape (open source svg and draw editor), CamStudio (video screen capture), Audacity, GIMP, Sqilrlz Morph.

Multimedia players : Juice (iPod), Joost …