/r/thegreatsub | /u/sub_toppings_bot
Source code repository for the Reddit subreddit / bot combo that is The Great Sub.
Basically, it listens in to Reddit's new comment stream, gets the newest comment's subreddit, steals it's top post and posts it to /r/thegreatsub. Rinse, wait 5 min, repeat. It's just a little bit of fun and Python, though it's helped me discover plenty of new subreddits.