This site has tons of info such as building costs, how scores are calculated, and all stats and more, really helpful.
http://ikariam.wikia.com/wiki/Main_PageThis site really helps out in finding info about anyone in the game as well as several calculators to help you see scores and costs and etc. Recommended usage.
http://ikariam.ogame-world.com/index.php (this site should be a BOOKMARK)
[Note: Be aware that it is an external page to Ikariam, it is NOT updated frequently so it is NOT up to the minute, or day, maybe even month. It'll give you an overview of your target but once in battle do not trust it too much, since they could invest heavily in military without you seeing it immediately in the tool. So be prudent in its use, use it to find and size their towns but before and once you're in combat use the ikariam searches to keep taps on their power.]
You must have Firefox and have the Greasemonkey add-on to download these scripts:
This is a link for a site where you can download an add-on to the game in order to see a players Gold Score, High Score, and Generals score in the island view.
http://ikariamtip.com/score-search-toolThis one is to view when alliance members are online or the date they were online last. It also shows point growth of members. It works through your embassy and also notifies you when there are new members or missing members. This tool eliminates the need to search and see if members are active or not and how fast they are growing. The link is through the board site but in the first post in the thread, click userscript and it will install.
http://board.ikariam.org/index.php?page ... adID=46289
This one allows you to view players in order of amount donated to the resources on your island that was changed with the 2.8 update. It also shows you if players are donating enough on the island by showing leechers in red, those in risk in blue, and those that have donated enough in green.
http://userscripts.org/scripts/show/34434This one is a Citizen alerter so when your citizens get close to full in your towns, the population will be highligted red. it is customizeable to be bold, or whether when you have 20 people till full population or by a percentage until full, etc. link is through the board but just click on the link and it will install.
http://board.ikariam.org/index.php?page ... adID=38849
This one is called Solarium and adds weather effects to your towns as well as day and night based on your own time. Really neat and can tell you the forecast for the day and when certain weather will take place. click on install script when taken to this page.
http://ikariam.pezmc.com/solarium/This one lets you reorder your towns in the drop down menu and makes trade easier.
http://userscripts.org/scripts/show/27630This site offers 4 different scripts to use with the main one being the wikia bar. That allows you to open a side bar enabling you to the site features of WikiIkarium, the site that is the first link in this post. The other 3 are a Notebar, Quickbar, and Fightbar, all to help in their own certain ways if you need or prefer them. Just click the install links to the ones you want to install.
http://ikariamwikibar.googlepages.com/homeThis one is an excel map of the world to benefit those who want to download it.
http://files.filefront.com/Ikariam+Mapx ... o.html/1/1
This one is the CR converter.
http://64.81.242.253/ikariam.phpThis is Gunmetal Ikarium, a visual redesign of the game that is eye candy for those who want it. Only works for PC though.
http://www.gunmetal.ikariamods.com/