It would be cool if there was a place on SO to share code. Not to ask specific questions, ask for reviews but just to say: "Hey guys, I made this cool XXX, here is the code, what do you think?" or "anyone wants to try to improve on it?".
This sentiment was expressed in many previous questions: here, here and here for example. Questions like this make me think the community just misses a lot of value.
The problem is that the accepted/top answer is always some kind of work around to conform to SO format (questions and answers, not sharing) you can't do this in straightforward way which is discouraging and often not fun. I think it would be great to just have separate Stack Exchange for sharing code snippets/solutions to problems. It would greatly benefit from existing community and I think many would love to participate as sharing is fun for people.
Everything from: "hey, here is my new Sudoku solver in Haskell" to "Here is sweet plugin to Notepad++" could do. Existing upvoting/downvoting/tagging system along with community would make it exceptional place comparing to just posting stuff on Reddit and other places where it's quickly lost and is difficult to search for.
What do you think ?