eBay4R is a Ruby wrapper for eBay's Web Services SOAP API. Has ease of use and small footprint. Instead of 40-50 line examples eBay gives you in C# and Java, with Ruby and eBay4R, examples are 5 lines or less.
The daily deal space is hot, and has been for some time now. In the past year 23 million Americans have purchased a daily deal or group coupon according to a survey conducted for the American Institute of CPAs by Harris Interactive (source). Not to mention Freelance websites, such as Freelancer and Elance, have been flooded with thousands of "Groupon clone", "daily deal site" and related job postings - a general sign that many more businesses are still trying to get in.
While industry analysts expected this year to be the year Mobile Backend-as-a-Service (MBaaS) took off, end-of-year assessments are suggesting that there is still room for further growth in 2014. Forecasters predict a 104% annual growth in the market to reach $7.7 billion in 2017, while this week's acquisition of MBaaS vendor StackMob by PayPal has piqued more than a few businesses' curiosity. Meanwhile, analysts from Forrester and major players like Rich Mendis from AnyPresence believe the MBaaS revolution is still yet to happen for the enterprise.