... Project?

Probably not the best ever at anything, but it does that and quite a lot of other stuff. You could skip the details you're not interested in ( resources allocation etc) and keep it simple.

Also, it fits great if your day job is a structured environment.

If it's not, or you use Mac (as I do) you can try gantter project, it's a google apps add-on. Great for collaboration.

Just my 2c...