Visual Studio 2008 Released

I think there is no need to explain what Visual Studio is, just throw a link to the trials and express trains.

Visual Studio Team System 2008 Team Suite (90-day Trial) . Mass - 3921.2 MB
Visual Studio Team System 2008 Team Foundation Server (90-day Trial) . Mass - 1317.8 MB
Visual Studio Team System 2008 Test Load Agent (90-day Trial) . Mass - 551.0 MB . Note: This Trial Edition has full retail functionality but will expire after 90 days or 25 runs, whichever comes first .

Also, free Express versions can be downloaded from here (here are links to Web Installers).
You can also download the 900-meter ISO image on which installers of all express studios are collected.
MSDN Express (300 MB) - MSDN for Express Studios.