Sinatra, a Ruby "micro framework" for developing Web applications, is hot stuff! Despite being over a year since we first mentioned Sinatra (as used on a 100 line blogging app called Reprise), only now does Sinatra seem to have reached critical mass - it's on the cusp of becoming really popular. This is a good time, then, to check it out and see where it could fit into your own projects (with the new Rails Metal functionality (in edge/2.3 only) you can ever run a Sinatra app as a lightweight companion integrated with your Rails apps!)

Whenever you run a Ruby program, Ruby's parser processes the code and turns it into an "abstract syntax tree" (an AST) which can then be either turned into bytecode for YARV (on Ruby 1.9) or be interpreted immediately (as with Ruby 1.8).

2008 has been an interesting year for Ruby. Some people are going to remember 2008 as a snarky, uncivil year, filled with call outs, lay-offs and bitchiness. There has been an increase in negative articles about Ruby, even from prominent Rubyists. Back in November, KirinDave said that Ruby is in "a very bad place" and lacks momentum.. as if!

It was a few months ago that Rubysophic - a Bay Area startup working on products relating to Ruby diagnostics - came quietly into the Ruby scene, launching their first product, RubyRun Community Edition, a free, standalone application-performance diagnostic tool. While the most obvious use is with Rails applications, RubyRun works on any Ruby code (within reason) though it's primarily suited to Web applications.

Everyone's favorite Australian Ruby developer, Dr. Nic Williams, has put together a handy slide presentation called How to Package Your Ruby Code where he demonstrates how he packages his various bits of Ruby code using RubyGems. His process is backed by his own NewGem, a library that generates a framework for a new Ruby gem, and Hoe by Ryan Davis.

If you read Ruby Inside in 2006, you might remember our 2006 Ruby Advent Calendar. It featured the first look at the then-new AWS::S3 library, offered a Ruby code formatter for blog posts (which I still use here!), some Ruby wallpapers, and a lot more.

It's time to thank those great companies and individuals who help keep Ruby Inside (and often other Ruby sites) going. Note: All descriptions and notes are written by Ruby Inside and are not directly influenced by the sponsors. As such, any opinions stated are those of Ruby Inside and not necessarily shared by the sponsor!

What's Hot on Github is a monthly post highlighting interesting projects that are new or updated this month, within the Ruby community that are hosted on Github. Github has become an extremely popular place for Ruby and Rails developers to congregate lately, so I wanted to list some of the new projects, and some of the updated ones, that I have found interesting and that are too small for their own blog post.