This is a monthly art challenge. In a community on DeviantArt, a colour palette is posted, and you have time until the end of the month to create an image using that palette.
More information at www.deviantart.com/colour-schemes
This is a writing challenge running each month.
What's the challenge? Write at least 500 words each day.
Where, how to take part: Post on Twitter with the monthly changing tag, and insert your progress in a communal spreadsheet. More info at writingchallenge.org
This is a roughly monthly art jam running from one Friday to the following Sunday, noon to noon Alaskan time. There is a focus on fantasy themes.
What's the deal? You can leave prompts for other people to use, and/or draw sketches based on other people's prompts. You may not spend more than 1 hour per sketch. (Finishing it later is cool, though.)
Where, how to take part: Sign up on the official website, www.ellenmilliongraphics.com/sketchfest/