Kupfer, "a convenient command and access tool", is a Gnome program that can launch applications and open documents, and access different types of objects and act on them.

A new version, but some stuff is still a bit wonky for me (eg. triggers).

A little applescript to append text to a specific file (so it's not really a replacement for the QS command).

I don't think anyone will ever beat the good old Bezel interface. This one emulates Cover Flow, adding a bit of prettiness but making QS more distracting, harder to use.

Works well.

Wow. This is such a clever use of Quicksilver.

I'd forgotten about this QS plugin - it's brill.

Fumo interface for download - unfortunately it's now nothing like the mockups. Not recommended.

Interesting - I'm a bezel interface man, but could be tempted by this.

Nice tutorial - I've been tagging my files this way for a good while, but still picked up a few pointers.

Posting to Twitter with Quicksilver, plus Growl support.

Post to Twitter with Quicksilver.

Ooh! A much more sophisticated means of adding todos and events to iCal via Quicksilver. (Looks like it might be tricky to get the hang of at first, though.)

A nice-looking cube interface for QS (requires a build that I don't seem to be able to get, though).

Quicksilver plugin that "...lets you grab photos from the Finder, iPhoto and elsewhere and send them directly to Flickr with some tags." Nice one.

"You can now create mouse gestures to do anything Quicksilver can do using a plugin called Abracadabra."

A triggers-centric tutorial on using Quicksilver. (I set up a lot of triggers when the feature first appeared, but tend not to use them much - it feels more 'natural' to me to use the QS interface, if a teensy bit slower).

Get Atom Actions plugin/module here.

Good tips.

An intermediate tutorial.

Quicksilver makes it easy to add new lines to a txt file without even opening an application.