MoodJam is sponsored by Carnegie Mellon University. Users register, pick a color that they think reflects their mood, then label it and write some comments.
All of it is compiled and an overall ongoing color graph can be seen on its home page. You can add your own individual mood daily, and track that as well. Your moods have their own unique urls that you can post on your blog or online journal.
It’s a little hard to explain, so you might want to check it out for yourself. I think it might be a good project for English Language Learners to learn and use feelings vocabulary.
I had some initial difficulty registering, but they seem to have fixed that glitch.