Hi mrasnika,
I think there might just be some confusion over what our project cost calculator is showing.
I did indeed check out the projects and took a look at the code. I used a simple hand inspection to estimate the lines of code, and I also used sloccount to double-check our numbers [sloccount is great, by the way, but if you use it to check our numbers realize that it won't count HTML, CSS, or any JavaScript embedded in your HTML]. I think our analysis engine came up with very precise counts of the lines of code.
It's true that Krumo has a lot of HTML and some CSS and JavaScript, which is why its total lines of code is higher than Asido.
In the project cost calculator, the dropdown lets you choose between "Markup Only" (which includes HTML and CSS), or just "Code Only" (which includes PHP and JavaScript), or both (the default). If you choose "Code Only", you will see that we counted 1088 lines of code, which is smaller than Asido, as you expected.
The more important point that needs explaining is where in the world our cost numbers come from. We use an industry-standard model called Basic COCOMO. You can read about it in Wikipedia. This calculation uses only the total lines of code to generate its estimates. Also, keep in mind that this model was invented for use with large projects (that is, many years of effort) with full teams of developers, testers, writers, and managers. For small solo projects it is rarely even close to correct.
We provide COCOMO estimates because a lot of people are familiar with them, not because I personally believe COCOMO is awesome :-).