[metaguri]

If you prefer something a little more simple, Spectacle is a free program similar to ShiftIt and SizeUp. Basically it's shortcuts to put windows in any half or quarter of your screen, centered, maximized, or send to other monitors.

On the app store: http://itunes.apple.com/us/app/spectacle/id487069743?mt=12

(I have no affiliation with this program. But I like it.)

[jrajav]

A Spectacle fork on the HN front page* was the reason I submitted Slate (which I also have no affiliation with).

Now the circle is complete!

The more attention paid to these excellent apps, the better. We sorely need a solid, mature, and open tiler on OS X. Slate is the best option I've used so far, and by far the most thought-out, featureful, and configurable, but it's not perfect. I've run into memory leaks a few times and some of the features are still a little quirky.

*: http://news.ycombinator.com/item?id=4589446

[100k]

Another app worth checking out is Divvy. It can easily resize windows to a selected number of rectangles on your screen.

I use it to keep my text editor at exactly 1/2 my screen and arrange my Terminal windows.

[oh_no_my_eyes]

i love divvy. and its cross-platform.

[kiennt]

I just used Spectacle, it work well. Spectable is helpful and easy to use. But after that, i try Slate. At the beginning, it quite complex to config. But after 5 minutes, i really love Slate. Slate is more flexible then Spectable.

[emgsilva]

The same here... Spectacle is very simple to setup... But Slate is so much more flexible. After some minutes I covered all my uses of Spectacle and introduced some new ones (moving windows around is just amazing...). Great job from Slate developers, keep up with the good work!