A Wolfram Alpha Perl Library by Gabriel Weinberg is available to access the API for reference, search, and semantic purposes. An API explorer allows to enter queries and display responses linked to a wide variety of topics useful for developers. With this tool that aims to get more familiar with the Wolfram Alpha API, users could increase efficiency when they decide to work specifically with Perl language. Download can be accessed on the libraries' site.
Diffbot is one of the coolest new ideas on the internet. The service brings monitoring to the web in a new and interesting way. The company is just about to release a whole slew of projects built on its collection of Diffbot APIs for following changes to web pages and RSS, as well as extracting clean text from websites.