...

Start with honesty, good stuff.

As to the site..
The "Make a donation" button and Google ads seems
to rub with "..which you do not buy only one product
but you invest in a product. "

Is this site free, or commercial?

Web page format:
- The width of the site is far too wide on this 1024x768
monitor.
- The google ads seem oddly thinner than the left column
- I do not trust people who call themselves by 'nicks' on
the internet.  In most cases, this is not relevant, but if
you are trying to 'promote your product'* here, it is.

* Whether your product is commercial software, or
a free internet site.

I clicked one link and the page came up "Your
username or password is not valid".  Huhh?  
Who said anything about being a 'user'?  I don't
want to register, just see the damn page!

The English translations are relatively poor, I would
recommned removing all claims of English until you
can improve them.

Final summation:  Pretty poor, even before I look at
any substantive content.

"Don't become a spammer, now."

If you want people to look at your new tool, let them look without
setting up an account.  People won't sign up until you first prove to
them there is some benefit from the effort.