DTN IQFeed API wrapper (in C#) by Sentinel
Telvent DTN http://www.iqfeed.net
provides the fastest, most reliable market data through the internet. From our experience, there is no better value than Telvent DTN. Telvent DTN provides a developers API that supports programmatic access to their data. The API is pretty general and low level. This project exposes Televent DTN data feeds as a series of easily consumable objects. This allows the trader to focus on what to do with the data as opposed to trying to figure out how to retrieve it.
There is no formal release of this project yet, but we have published the code so far. It is usable and feedback and comments would be useful at this stage. We are carrying on with the development of this project and will have a formal BETA release later this year.