Poll Everywhere provides "instant audience feedback," no matter where you are. Create a poll and users can respond using a web browser, Twitter, or an SMS text message. The Poll Everywhere API provides access to just about everything except creating polls: retrieve a list of polls, get poll metadata (such as multiple choice), vote in the poll and access individual poll responses. The service is free for 30 responses, then plans start at $15 per month.
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.