> 
> * apps for learning to use a computer
> hot to use the mouse
> reconfigure the desktop in a game (as kpersonalizer, but for kids)
> app to learn to type (several levels: learning the letters, learning to use 10 fingers)

There are quite a few of these listed at apps.kde.com, try the link:

  http://apps.kde.com/uk/0/browse/Educational

> * enyclopedia
> like encarta
> is the database online?
> is kdict the same?
> other languages?

Currently at apps.kde.com is listed QGeo, which can read and display CD's
from the National Geographic Interactive collections.

> * language software
> kvoc
> with pictures
> animation
> embedded in a story
> voice based
> (in Germany pupils in the age of 6-10 will learn english from next year on,
> but without writing, only based on talking)
> 
> grammar training
> "fill in the gap" program -> to make work sheets for teachers and online exercises for children

There are a number of translation apps at apps.kde.com, to list a few:
  KQuick
  KSteak
  KabelFish
  QTrans
  Wordtrans

> spell training -> ala "didacta"
> 
> treasury of words: learning of similar words
> 
> 
> * apps based on good TV programs for kids
> - sesamestreet
> - in Germany: Löwenzahn, Die Sendung mit der Maus
> 
> * little games
> 
> * school lesson wizard
> like a school book in multimedia
> you can add films, pictures, text
> use of kparts: noatun, kword, pixie, ...
> -> ala "mediator"

The closes to this I think is KEduca.

> * databases for knowledge about history, biology, ....
> apps based on exchangable databases, so that users/teachers can share the databases
> 
> * keduca
> database is missing
> helps the child to revise a subject
> 
> * math
> young:
> children get tasks like "4+7=" and if it's right they see a nice animation

The closest here I think is Keuklid (a little more advanced, this one teaches
geometry).  But there is also kalcul.
 
> 10-14:
> sequences, algebra, perimeters, areas
> first: explain how to do something
> then: tasks to solve
> 
> * printing greeting cards