Twivatar is a RESTful API to a Twitter user's avatar built out of frustration of external Twitter apps breaking when the avatar url is stored, and then changed by that user later on Twitter - the result is a broken image on that app unless they constantly check for profile changes.
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.