The web is loaded with photography information and many photographers are giving it away freely. Some information comes with a price tag but generally the cost is minimal. Here are a few of my favorite sites, books, podcasts, etc.
Serge Ramelli http://photoserge.com/ He has free podcasts and video turotials mostly dealing with HDR.
Digital Photography School http://digital-photography-school.com/ Tips, techniques, and reviews. Free stuff and inexpensive ebooks.
British Journal of Photography http://www.bjp-online.com/
Luminous Landscape http://www.luminous-landscape.com/index.shtml Lots of technical and useful info. and reviews.
Martin Bailey http://www.martinbaileyphotography.com/ Nature and wildlife. Also has a podcast and is on Stitcher Radio.
Cambridge in Colour http://www.cambridgeincolour.com/ A learning community with daily/weekly/monthly contests (all for fun).Birds as art
Birds as Art Art Morris http://www.birdsasart.com/ Everything you wanted to know about bird photography (with Canon gear). I also have a couple of his books.
Vincent Versace http://oz2kansas.com/downloads/downloads.html Lots of B&W. I also have his book of the From Oz to Kansas.
Book The Art of Photography by Barnbaum.
Many Photoshop and Lightroom books and videos. Mostly from Scott Kelby and Martin Evening.
The Photographers Eye by Michael Freeman.
The Practice of Contemplative Photography by Andy Karr and Michael Wood.
Photographically Speaking by David Duchemin.
I also have recently purchased some actions from Tony Kuyper at http://goodlight.us/writing/luminositymasks/luminositymasks-1.html I am still in the learning stage with these but I like the results.
That is the short list, maybe a third of the whole. I am sure I left out a few that I visit regularly. If you have any favorites feel free to share!