Here is a nice list of Open Educational Resources:
http://oerconsortium.org/discipline-specific/
Here is another source:
Physics:
http://www.lightandmatter.com/
Here you can learn some Chinese:
http://www.learnnc.org/lp/editions/mandarin1/cover
Learning by Expanding Chapter 2
http://communication.ucsd.edu/LCHC/MCA/Paper/Engestrom/expanding/ch2.htm
‘Open Access (OA) is an umbrella term covering a number of implementation concepts which, in the words of the Berlin Declaration
, support “open access to knowledge in the sciences and humanities”.
The open-access.net platform provides comprehensive information on OA
and offers practical implementation advice. The first round of the
project, which has already been completed, was devoted to building the
platform. The main goals of the current second round are to establish a
network of OA promoters as a lobby for OA on the science policy level
and to internationalise the open-access.net platform.’
Cloudworks is a great tool to collect and connect ideas on teaching (clouds) and people involved in teaching. What lacks is a visualized presentation of the connected ideas and people.
I think it should be possible to view the object in connection with other objects and people and then the connection from these people to other ideas and people. This is a poor sketch:
This should be dynamic that you can move to other bubbles can see their relations to other objects and persons. I’m sure there is a software to generate this automatically. 
The complete results of the accessibility checks are here:
After realizing that ecto is not open source I tried to find an alternative. Here is one ScribeFire. It’s an Firefox Addon.
This is the first entry produced with ecto. ecto is a nice blogging tool for OS-X which allows to write posts direct from the desktop, without to need to login, with a comfortable editor and a lot of features. It’s just like sending mails. Very nice. Thanks to Billy for the tip.
On 24.11.
Oops, it’s not open source 
