Here are the teams and their software:
These guys started out creating slick themes for Ubuntu, and before long started making their own apps. They've started up so many software projects, particularly in the last year, I don't know how they could possibly have time to work on them all:
- Postler (mail client)
- Maya (calendar client)
- Wingpanel (top panel app)
- Plank (dock)
- Slingshot (app launcher)
- App Center (app manager)
- Marlin (file browser)
- Devkit (developer toolkit)
- Beatbox (music player)
- Last, but not least, there's Purple, a dictionary app which, although currently in Python, is going to be rewritten in Vala.
There's also Midori, a lightweight browser, which I don't think the Elementary team started, but I know they contribute to it, and somehow or another Vala is involved, possibly due to their influence.
As if that wasn't enough, next month the Elementary team is releasing their own GNU/Linux distro, based on Ubuntu, but with a cleaner interface and packaged with many of their apps. Here's an early screenshot: