Here are some links to organisations or projects that I think are fantastic (in no particular order):
My home institute.
Manchester HEP: http://www.hep.man.ac.uk
The institute I did my PhD with.
Working with women in STEM (Science, Technology, Engineering and Mathematics):
For while the code is compiling:
PHD Comics: http://phdcomics.com/comics.php
Blogs I read:
The Spectrum Of Riemannium: thespectrumofriemannium.com