One page portfolios

I like these:

http://andrewlohman.com/

which looks much like:

http://matoweb.com/

Backlink checker

Look here to find an alternative to Yahoos backlink checker:
http://seo-hacker.com/great-alternatives-yahoo-site-explorer/

New comparison:
http://www.seobook.com/comparing-backlink-data-providers

Javascript include – tricks

You can include a javascript like this:

function include(filename)
 {

var head = document.getElementsByTagName('head')[0];
 script = document.createElement('script');
 script.src = filename; 
script.type = 'text/javascript';
 head.appendChild(script)

}
Read more here: http://forums.digitalpoint.com/showthread.php?t=146094

Or even better:
You can easily read another JS-file inside the javascript using jquery:

$.getScript("my_lovely_script.js", function(){
    alert("Script loaded and executed.");    
  // here you can use anything you defined in the loaded script 
});

Read here: http://stackoverflow.com/questions/950087/include-javascript-file-inside-javascript-file

Make a tagcloud easily

Using this service:

http://www.tagcrowd.com/

Just use a list of words, and the tagcloud is created.

Long tails

This program might come in handy: http://www.longtailpro.com/

Make Google Maps..

Use:
http://gmaps-samples.googlecode.com/svn/trunk/spreadsheetsmapwizard/makecustommap.htm
or:
http://mapmaker.donkeymagic.co.uk/

UPDATE:
These Google Maps tools actually seems better to me:
www.imapbuilder.net – paid, but with some export options free
http://mapalist.com - free

Guides for using Excel with Google Maps:
http://www.ehow.com/how_5879146_create-google-map-excel.html
http://theclosetentrepreneur.com/export-excel-data-to-google-maps

Website security

To avoid hacker attacks you should close SQL injection holes and add all available hotfixes, pacthes etc.

That should block tools like Havij, Acunetix og Nikto to get into your webapp…

Cheap psd 2 WP

Check this out – it looks cheap:

http://www.markupbox.com/order-now.html

Collaborate on sorting pictures

This looks quite cool if you need to sort some pictures with the help of somebody else:
www.canvasdropr.com

A tool for making flash banners easily

You can use this tool:

http://www.bannersnack.com/en/