What started a short list became quite a big description, more details inside the post.
Best Practices for Building a Microservice Architecture. Looks like a wide set of questions covered.
Official Elasticsearch client library for Node.js and the browser.
SpinKit - a collection of loading indicators animated with CSS, very nice looking.
Amazon CloudFront CDN got Geographic Restriction feature. Now you can allow/deny access to files by Country code.
Float label forms pattern implementation in JS. Here is demo visualization.
Piwik 2.0 released. New design, looks more modern.