There are some weird APIs out there. That's what Craig Neslage found out when he looked through APIhub - a giant hub for APIs similar to ProgrammableWeb. Let me give you an idea of the weird level we're talking about here...
As NoSQL solutions are getting more and more popular for many kind of problems, more often the modern projects consider to use some (or several) of NoSQLs instead (or side-by-side) of traditional RDBMS
I always wondered if you could extract structured data from Wikipedia. Then I stumbled upon DBPedia and SPARQL. DBPedia stores Wikipedia data as a dataset, and it can be accessed using SPARQL. Let me demonstrate this with an example.
Apache Lucene and Solr PMC recently announced another version of Apache Lucene library and Apache Solr search server numbred 3.6.2. This is a minor bugfix release concentrated mainly on bugfixes in Apache Lucene library.