SKYNITE  The above download link now downloads version 2.3.6a, which addresses an Installer issue that was reported on MacUpdate. Thanks for your reports.  
(Version 2.3.6)

SKYNITE  From the Developer:

Hi Tomis,

DarkAdapted is not coded in Xcode because I also wanted to make it available to Windows users (albeit not the Pro version, which is Mac-only).

The non-Universal Binary version checks in at about 4 MB; if you want an Intel- or PPC-only build, let me know.

-- Steve  
(Version 2.2b4)

SKYNITE  Hi JETFIREDX,

DarkAdapted Pro *does* control separate displays independently. Once it is registered ($10), you can type command-D and have different windows open for each display.

The Pro features also include scheduling, scroll wheel support, etc.

'Hope that helps,

Steve  
(Version 2.0)

SKYNITE  I run both NetMonitor and MenuMeters, but I use NetMonitor for my network graphing, largely because of its appearance, but also because of its extensive configurability.

NetMonitor is simply beautiful in my menu bar. I have a wide bar graph display with fade out and transparency, and it looks like it was designed to be part of Mac OS X, while being very functional.

I also use MenuMeters for some of its other functions, but its network graphing can't come close to NetMonitor's. I recommend NetMonitor highly.  
(Version 4.1)