This thread is a help for those of you looking for that perfect Tray Managment Utility.
Bellow, you'll find links for the various apps for the job, mentioned in this forum, a brief description of them, and some relevant DC links.
If you know of other interesting apps similar to those mentioned, please feel free to post a brief description of them below, and it will be added to this post.

Relevant posts on DC's forum about this matter:

  Fewer system tray icons?
  Tray Management Utilities Mini-Review

On these posts, the following apps have been mentioned:

  System Tray Window Manager
    (freeware)

  TraySaver
    (freeware, but development stopped)

  Tray Manager
    (freeware, no homepage mentioned)

  Captain Tray Pro
    (not freeware, but trial available)
    Discount available:  https://www.donationcoder.com/forum/index.php?topic=2319.0
 
  The two apps that seem to be the favourite in this matter are:

  SysTrayX
    (not freeware, trial available)
    The good: Good tray icon detection, minimize to tray function
    The bad: not the best-looking interface, development stopped, subscription renewall every year
    Mini-Review available: https://www.donationcoder.com/forum/index.php?topic=2315.0 (By Josh)

  PS Tray Factory
    (not freeware, trial available)
    The good: Simple interface, good tray icon detection, hotkeys for click simulation
    The bad: difficult to arrange icons
    Discount available: https://www.donationcoder.com/forum/index.php?topic=2339.0
    Mini-Review available: https://www.donationcoder.com/forum/index.php?topic=2315.0 (By Josh)


I hope you like this list, and it can help you find what you're looking for :D

Hey! I have a doubt to post to you users of dual-monitor layout.
I have just noticed that it may be a big help to me having such configuration, since my laptop's screen is quite small.
As i have one crt monitor from an old computer, i figured "why not connect it to my computer and have much more space?".
But my problem is exactly that, i have one laptop, and it doesn' have a very good gpu.
What i wanted to ask you is if there is any possibility for me to connect that screen to my computer and use it as a second desktop.
I have one ATI Radeon Mobility X700.
I hope someone can help me, that would be really handy.
Thanks!

This program had already been mentioned in donationcoder, but i think it didn't quite get the attention it deserves.
I was now using it, and i think it's so usefull that i decided to do a small review for you.

All Snap is a program that runs on the system tray, using about 1.5mb of ram, and 2.4mb of virtual memory.
This program allows every window to have the "snap" feature. This means that when a window gets in some (customizable) distance from another, their borders get attached.
This feature is, in my opinion, very required by those users that tend to not maximize any window, and get the desktop quite cluttered with windows.
Although I'm not one of those users, i like to maximize almost everything, i use allsnap to snap the IM's windows to each other, so as i can see several of them at the same time, without having much work organizing them.

AllSnap is configurable from the right-click menu on the system tray icon:



In this menu, you have access to the about box, the help, the settings dialog and the option to turn window snapping off (which has the same effect as closing allsnap)
By clicking the settings option, you get the following menu:



Under "general", the first two options determine the distance that windows attract each other, and the toggle key is the key that, when pressed, disables the snapping, in case you just want to move a window without completely disabling the snapping in the tray icon's menu.
The "Snap To" section is quite self- explanatory, and the Enable Snapping checkbox does the same that that option on the tray menu does.

On the "sounds" tab, you get:



Here, you can select the sounds to be played when the snapping is done. The default sound are very good, very discrete, and allow you to know when the snapping is being done. Sometimes, you might not be able to put a window at a certain distance of another because of the snapping, it's good to know it's because of that, before you go crazy trying to do it, that's why i keep the sounds enabled.

Under the "advanced" tab, these are the options you get:



These are some options that are mostly for compatibility with some themes, strange windows or OSs other than windows xp (there's another option that only appears in systems other than xp, which allows icons on the desktop to be arranged in grid, like xp does).

As for links, here is the home site of allSnap: http://ca.geocities.com/[email protected]/
and here's the link for fileforum's downloads: http://fileforum.betanews.com/detail/allSnap/1027622040/1 (this link is for the beta version, at the home site of allSnap there is a stable version)
Hope you like it!