• Technology Preview: Introducing Flying Passenger - The latest brainstorm from the Phusion folks.
• Rails Security - One month free course via email.
• Internet Explorer 11: "Don't call me IE" - Looks like IE is taking a big step towards web standards in the next version.

• Will Leinweber - Check out the public contribution history on this GitHub repo.
• Release Your Software - Github's downloads are back, with improvements.
• Capistrano V3 - A big rewrite is about to release of this key deployment utility. Check the release announcement too.

• The 2013 Rails Rumble is On! - Time to start thinking about flashy throwaway applications again.
• Comparing MRI Rails App Server Performance on Heroku - An investigation with numbers.
• Announcing High Performance Rails - Another good-looking book in the works.

• CapybaraConsole - Another testing tool for your Rails applications.
• The Misplaced Obsession with Simplicity - Beware of mindless dependence on code metrics.
• Screen Siz.es - Look up pixels, size, and resolution for a whole mess of phones, tablets, and monitors.
• Sublime Text 3 Public Beta - Yep, it's out.
• Is my gem ready for Rails 4? - An aid to updating your applications.
• Packer - Tool to generate machine images for multiple platforms from a single set of configuration info.
• Neocities - If you miss the pleasure of creating static web sites with Geocities, here's the answer.
• DevDocs - Online developer documentation reader. Currently hosting docs for HTML, CSS, and jQuery.
• console.image - Meme generation directly inside of Chrome DevTools.
• We retire 1.8.7 - Ruby 1.8.7 is officially out of support now.

• The case against using RubyGems.org in production - Really a case against blindly installing gems from any source.
• Pollen.io - New service that promises the help you reduce customer churn, taking early access signups.
• Hostname check bypassing vulnerability in SSL client - The security announcement that goes with yesterday's release of new Ruby versions.
• Introducing Heroku Fork - After forking code and databases, forking entire applications is the logical next step.

• Why I'm Not Using RubyMotion in Production - Summary: GC issues.
• Test-drive Rails 4 With BitNami - Probably the easiest way to bring up a new Rails 4 test environment.
• Nitrous.IO is now in public beta! - Slick-looking online dev environment open to all, with a free tier that's just large enough to be useful.
• Hakiri - Command line security scanner for various technologies you might find in your Rails stack.
• Tixef - Online code review tool with language aware diffs and other syntax driven analysis features.

• Rails 4.0: Final version released! - It's not everything I personally would have done, but certainly a great achievement and I'll be upgrading. Rails Guides are updated too.
• Rails 4 on Heroku - How to do it and what you need to tweak.
• RailsDiff - See the differences in generated applications between versions of Rails, so you know what you need to update.
• Resources for Mac and iOS Developers - Lots and lots of links to get you started.

• 5 Minute Fork - Automatically serve up the static content of a GitHub project via a temporary fork.
• Gemrat - Multiple Gem Support & More - Add gems to your Gemfile from the command line.
• Casting: adding behavior to objects without using extend - Another take on how to enhance existing classes in Ruby.

• Runscope - Online service that offers debugging for external APIs.
• SemVer 2.0 Released - Yes, it's a new version of the spec on how to compose version numbers.
• A List of Programming Screencast Series - For those of you who learn by video, Avdi has a good set of bookmarks here.

• Hashifiable - Declarative JSON representation for ruby objects.
• Lyn - Spiffy-looking image browser for OS X. $20.
• Snooze.io - "Background job monitoring as a service", that alerts when something doesn't run on time.
• Ruby Mixins & ActiveSupport::Concern - How to use them and where they fit in the ruby object model.

• An In-Depth Look at the New Relic Platform - NR launches a new plugin-based extensible monitoring effort.
• Erato - Another Markdown editor for OS X.
• Developer Spotlight - Dana Jones - My sweetie makes the big time.
• Nginx for Developers: An introduction - Basic installation and setup.

• Repository Next - Big redesign from GitHub. I'm not convinced, but perhaps I'm just too old to learn new tricks.
• Leveling Up on Chef Best Practices - The chef ecosystem is something I really need to learn better one of these days.
• Secrets of the Browser Developer Tools - Things you can do with Chrome, Firebug, Firefox, Opera, and Safari.
• If Your Business Uses Rails 2.3 You Need To Move To A Supported Option ASAP - A look at the alternatives for old apps moving forward.

• Onion Pi - Anonymous browsing anywhere with this portable Tor proxy.
• Stubbing Views in Rails Controller Testing - Avoid the overhead of rendering views when you don't need them.
• Returning to Free Software: A Guide - Cutting ties with the folks who have cooperated with PRISM.
• Arproxy - Analyze or modify SQL in between Active Record and your database.
• RailsMailPreview - Free solution for previewing email from Rails applications on OS X.
• Docracy Terms of Service Tracker - Adds/edits/deletes across more than a thousand sites.

• Boxcryptor - Software to encrypt your files before you send them off to the cloud.
• Ultimate DevOps Academy - 12-week $999 online course.

• Instant Server - Free and easy provisioning of temporary servers.
• Introducing Invoker - A way to get all the servers that your application depends on under control in development.
• Rails 4.0: Release Candidate 2 released! - On track to have the final version before the end of this month.

• JSON Generator - Define a schema to generate random JSON data.
• Introduction to Bogus - A test library to implement safer mocking.
• Being paranoid with Ruby gems - It's probably just a matter of time before we get hit with a high-profile exploit payload delivered via Bundler and rubygems.

Back from the woods. It was refreshing. Makes me realize how much I really don't like working with computers, though.

• My Privacy Plan - Ben Matthews works through how to have a smaller public online footprint.
• Mastering Modern Payments: Using Stripe with Rails - An ebook that goes beyond Stripe's tutorials.
• Passenger and Ruby Ubuntu updates - Brightbox continues to supply native packages at recent patch levels.
• Hello, Cuba! - A look at this minimalist ruby web framework.
• Ladda - Javascript UI to integrate spinners directly with submit buttons.
• nsa_panel - Easily add a NSA backdoor to your Rails app.

• FriendCode - Repository hosting with collaborative online editor and cloud deployment built in.
• Needle - Test your CSS with selenium by comparing screenshots with known-good saved versions.
• Rollbar - Another online error-tracking service.
• GitHub workflows inside of a company - Some research on how git gets used on closed source in larger organizations.
• Topcoat - "CSS for clean and fast web apps".

• Phusion Passenger 4.0.4 released - With a small pile of bugfixes.
• Gitray - Nice tree-style viewer for GitHub projects.
• Wintersmith - Static site generator built on top of node.js.

Double Shot is going to be spotty over the next three weeks, due to a heavy camping commitment on my part. I'll post when I can, and regular daily issues will be back sooner or later.

• On Interface Segregation - Getting to higher cohesion and less coupling in your Ruby code.
• Floobits - "Cross-editor real-time collaboration", which is to say you can synchronize edits in a copy of ST2 and a copy of Vim.