NaNoWriMo alternatives?

With the latest news, I was wondering if anyone knows of any websites, communities, or any other alternatives that are similar to NaNoWriMo, where I can enter a similar month-long challenge and be able to keep track of my word count for future reference? I know I’ve heard people talk about there being NaNoWriMo alternatives, I just don’t know any specific ones and was wondering if anyone here has heard of them.