What ways are there to create forms in SharePoint site?

Hi,

My question is related to creating forms within a SharePoint site.  As an example a site member can add a document using a form created in InfoPath that gets saved back to the shared document workspace within the site.  I have heard that there are other ways to create forms such as using the designer to create ASP.net forms.  Is there other ways of creating forms within a SharePoint site?  If you need anymore explanation of what I am trying to do please feel free to respond in this post or send me a message.

Thank you!