Quicksilver is back under development - the latest version is 1.1.2, and the last commit at their repo[1] was five days ago... Not on fire, but there is stuff happening.

Also, you may like Moom[2] for window management - sucky name, but the feature set makes up for it ;)

[1]: https://github.com/quicksilver/Quicksilver/ [2]: http://manytricks.com/moom/