I hate to categorize Enso with other application launchers, because it is so much more than that. Enso attempts to connect computing with language. Enso appears to be rather original in its approach, but for those familiar, it breathes of language like Ubiquity and Application Launcher/Searcher like Quicksilver.

Some of the features of Enso (with all of the beta packages installed) include: application launching (with custom aliasing), dictionary support, google map integration, window management/manipulation, and media player controls.

There is quite a bit of documentation on their website as to what exactly Enso is, if you want the specifics. Here are a few things that I believe characterize this application: its simplicity (very fast and sleek interface), quasimodal (has no initiator key combo per say, but intends to act the same way the shift key does - in typing commands while holding down its designated key), and is in early beta.

Even though Enso is young, it certainly has a lot of potential. His designers have several videos on their website detailing the direction they want Enso to go. Something to look forward to is an enhanced and simplified developer API. Enso is already extensible, but a revamped API will greatly aid in proficient development.

If you want to grab a copy of all the currently released beta packages head over to: http://humanized.com/enso/beta/all. Enso has already enhanced my productivity. Oh, and did I mention its open-source?