Dynamic PDF is a .NET library for creating PDF documents. Their royalty free distribution license is around 2k. You can download a free trial and it has a lot of examples to help you get started. Feature Chart
This library does not support tracking in the current version (4.0) Tracking and Kerning are planned for version 5.0, but only with their TextArea control. The TextArea control supports only one style, whereas the FormattedTextArea control supports character by character style changes.
You can write text in outline mode (TextRenderingMode.Stroke), but you have to override their label class to do so.
Their forums are very responsive and helpful.
ITextSharp is open source and a little awkward, since it's a port from java.
