Possible Duplicate:
Where can I advertise an open source project?
I'm going to be starting up an Open Source project which is an XML based forms (as in HTML forms) engine written in .NET and was wondering what advice people could give on promoting open source projects.
If I'm not mistaken, StackOverflow offers free advertising to OS projects looking to build up a community.
I would strongly recommend to you to have a look at excellent book about that:
Producing Open Source Software
It is comprehensive book discussing about open source projects, how to get the most out of them and more.
Writing articles is a great way to promote your projects. I personally promote my Open Source projects using CodeProject. There are several others, but it's a good way to demonstrate the functionality of your project, illustrate why others would find it useful, and otherwise promote your hard work.
-Doug http://www.ddaysoftware.com
PS: Include your web site in your forum post signatures :)