Some of my favorite and often used edtech tools:
Hypothesis – a service that allows me to quickly highlight and annotate content on almost any web page or .pdf file
IFTTT.com – a service which I use in combination with other services, most often to get data from those sites back to my own. For example:

Recipe to get Hypothesis annotations from Hypothesis to my site
Recipe to syndicate Goodreads posts of books I’m reading to my website

Huffduffer.com – a service I with audio related content I find online. I use its bookmarklet to save audio from web pages. Huffduffer then creates a custom RSS feed that I can subscribe to in any podcatcher for catching up on podcasts while I’m on the go.
Post Kinds Plugin for WordPress – since many in the class are also using it, I’ll mention that I love using its bookmarklet functionality to quickly bookmark, favorite, or reply to other posts on the web.
URL Forwarder – This is an Android-based app that I’ve configured to dovetail with the Post Kinds Plugin and my website for posting to my site more quickly via mobile.
Jon Udell’s media clipper – I use this audio/video tool for finding and tagging the start and stop points of media so that I can highlight specific portions for others