You will find most of the folks at Obsidian use these applications for day to day work: Visual Studio 2005, Max, XSI, Motion Builder, Photoshop, Perforce, Source Safe, ZBrush, Unreal Ed, MS Word, Sharepoint, MS Excel, Outlook and our own proprietary tools (Onyx Engine Tools & NWN2 Electron Toolset, etc.)
-Brennecke