Kronos Utils is a Greasemonkey script for Firefox that changes the user interface for Ikariam in many useful ways. You can participate in feautres discussion on userscripts.org page.
The script is a little more advanced than GM scripts usually are; it tries to understand (and get an overall view of) what happens in the game as you play it (by peeking over your shoulder, so to speak — it peeks at all views you bring up in the game, while it improves a thing here and there), rather than bashing the servers with http requests, as soon as it needs some piece of data. This means that you should start with a tour to your library (there is a link to it in the left pane of your Academy), just after installing it:
kronos tool
As you probably note, the view has been combined up a bit into a tech tree, where the vertical line shows how far into the tree you are now. Adjacent techs can be researched right away by choosing the appropriate category, techs farther to the right depend on prior advances. Hover a name to see all its prerequisites get checked, and a tool tip about how many Research Points they will take to get to, cumulatively. (You can filter the view to only show unresearched advances by clicking the header. This is useful if you don’t have a large enough screen to see the entire list in one go; chances are you’ll get a better overview with the smaller selection.)
Anyway, go here on each server you play on, as the script finds out what techs you have researched on this page, which it will need to correctly predict how many people fit your in your Town Hall, how much buildings cost, what growth rate each of your cities have, and similar. (You may need an occasional visit here as you learn new such techs too; Well Digging, Holiday and Spirit Level all being good examples.)
Here is a fairly typical shot of three useful core features — the building level bubbles, wall clock completion times and (on hovering a building) a tooltip about how much resources and time will be necessary for its next upgrade:
knoros tool
Not hinted at much in this screen shot are two other hidden features: buildings you have enough resources to upgrade right now get a white background tint instead of the yellowish shown here (both in the level bubble and resource needs tooltip), so you can see in an instant which buildings you can upgrade without further ado and not. You may also browse future (and past) upgrade needs, just by moving your mouse over the tooltip and using the scroll wheel. Some buildings (presently Town Hall and Town Wall Smile will show some additional info in the level bubble — for Town Hall, how many more (or fewer, if you downgrade) people would fit compared to the present, and for the Town Wall, its defense bonus, given the current city size. Finally, click the resource tooltip to hit the game docs for the building in question. Next expansion level will be highlighted, so you can see if it brings any feature you want right now (a new unit for the barracks or ship yard, for instance).
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