Web excursions are select bookmarks from Brett's travels around the internet. You can see them all on Pinboard. Visit the bookmarks page for previous Excursions.

Web Excursions for March 15th, 2013

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Web excursions brought to you by MightyDeals.com, featuring great deals on software, training, and design resources.

Active Markdown: an experiment
Very cool idea using variables and formula within Markdown documents, with a Tangle type of interface for live adjustment. I don’t have a practical use for this right now, but it’s highly intriguing. [via Noah Paessel]
New user interface for ExpanDrive 3/Mac
A long-time favorite of mine got a much-needed makeover.
Google, destroyer of ecosystems
This is a great piece by Aldo Cortesi regarding Google’s exit of the RSS marketplace and why they never should have been there to begin with.
ranger
A nifty file manager for Terminal. Browse directory trees, edit, preview, open, copy and remove files and more, all with a “visual” interface. [via Larry Hynes]
blink(1) from thingm
Just got two of these in the mail and am having a blast. It’s a USB alert light with full spectrum control over the color, fading and blinking. You can control it from the command line, with scripts or via IFTTT.
Read Quick for iPad
Learn to speed read with stories from your own feeds. I haven’t tried it yet, but Rob Corddry was into it enough to ask me to revise his Top 3 picks on the last Systematic. While that’s not going to happen, I will link it.