Inktober was launched in 2009 by Utah-based illustrator Jake Parker, who created the challenge to "improve [his] inking skills and develop positive drawing habits.

What I think is cool about this challenge is that it is a reminder to just spend time drawing even if I'm busy,' said Barger. Inktober first started in 2009 and continues to gain traction every year.

Every day in 'Inktober' this month, some artists share a new illustration on social media. Here's a #comicriffs gallery of shared artworks that caught our eye.