BetterWorks announced an API that connects data points from across an enterprise into a single report, dashboard, or method. The API enables companies to gather the data necessary to create and measure company goals. BetterWorks aims to "combine the power of goals and the value of people".
Celoxis is both an online and installable project management platform integreted with Microsoft Outlook, iCal, Google Calendar, and Salesforce.com, among others. Celoxis explains the Celoxis API in a way that suggests they want you to be able to use it easily.