Code Plex

Microsoft open source projects:

PHP Excel classes 2007
this php project provides free seats for php classes with its help you can read or write php files on excel 2007.

SQL server Hosting Tool Kit :
this sql server is designed for server share hosting

Blog Engine .NET
it is made for .NET developers it is fully loaded blog engine.IT can run perfecly xml and SQL.

Coding 4 Fun Developer Kit:
it consists of controls samples,components taken from VISUAL BASIC or VISUAL C.This kit has a single installaion file through which we can easily reach or load source codes files.it also has tool box used for drag and drop.

THER ARE MANY CODE PLEX PROJECTS VISIT THE CODE PLEX SITE FOR DETAILS.