The fixer.io SDK is a client to fetch currency conversion rates written in Node.js. It is a JSON API for current and historical foreign exchange rates published by the European Central Bank. It allows you to Get historical rates, Request specific exchange rates, Get the latest foreign exchange and more.
Paidpiper, mobile payments processing provider, offers its unique mobile payments platform via the Paidpiper API. Instead of relying on network security to ensure reliability and compliance, Paidpiper's unique approach secures the smartphone making the transaction to prevent malfeasance and fraud. By securing the smartphone itself, no need for additional POS hardware becomes necessary.
Google's App Engine product has been available for developers to build upon since last April, and in that time has been free to all, up to certain resource limits. Many have taken advantage of that capability to build thousands of apps including some now in our directory like the iTunes clone The Cloud Player and the Yahoo BOSS search mashup 4hoursearch. But the most common request from App Engine developers has been the ability to go beyond the initial resource limits. As of today, Google has lifted those limits and will let apps scale beyond those early free quotas.