February is World Building Month, and aldersprig is answering questions on the topic... as well as juggling a dazzling array of fascinating settings.
jemstone has entries posting on world building this month, too, and his serial, "The Widow Wore Gold" is updating. http://chromiumslurpee.tumblr.com/ (His previous serial is collected at this tag: http://chromiumslurpee.tumblr.com/tagged/NOWAB - read it all!)
ankewehner is updating flash fiction - see her archives here: http://ankewehner.de/fiction/index
haikujaguar is running a serial "An Heir to Thorns and Steel" at her blog.
lb_lee has a prompt call here. (Until Wed!)
rix_scaedu has been posting a host of interesting serials.
kajones_writing is running a raffle in February. Her January round-up has links to a looooot of delightful fiction.
ysabetwordsmith is running a Torn World serial, "Squiggles", at this tag: http://ysabetwordsmith.livejournal.com/tag/squiggles
A Kickstarter for a set of urban fantasies by Laura Anne Gilman (aka suricattus): https://www.kickstarter.com/projects/980297055/sylvan-investigations-work-of-hunters-an-interrupt
ursulav is soliciting input on the opening chapter of something that may or may not turn into a thing with were-javelinas.
mizkit has posted chapter four of Magic and Manners: http://mizkit.com/cemurphy/shorts-and-more/magic-manners/chapter-four/
(If I did not mention you, that has everything to do with the fact that I am running on three braincells and the baby just woke up. If you're running a project, please feel free to link to it in the comments!)