NOTE -- as of August 2006 it looks like this service is shutdown. From the site: With the web services interface, you can plug Tagyu into your own programs. Add tag suggestions to your favorite blogging tool. The API uses a simple REST query. If you want to get suggested tags for a peice of content, you simply tack that content to the end of a URL and you'll get an XML document with the suggested tags.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.