With huge budgets spent on marketing, it's probably a good idea to keep track of which marketing avenues are working and which aren't. Call Tracking Metrics is a simple telephone call tracking service that aims at helping users link incoming calls to specific marketing campaigns and in so doing, easily track and analyze the amount of calls received due to that particular campaign. The Call Tracking Metrics API provides access to this functionality.
Factual provides easy access to the data that drives mobile, web, and enterprise applications. Factual recently improved upon its 58 million points of interest when it enhanced its Restaurants Data. Factual added over 400,000 restaurants to its database (bringing the total count over 1.2 million) and expanded the attributes available. The company provides the Factual API that enables developers to access this data.