To those who are using computers which are not connected to the internet, you can now download the GeoGebra 4.0 offline installers and install it in your PCs or Macs.
The development GeoGebra 4.2 and GeoGebra 5.0 has also been started. In GeoGebra 4.2 the computer algebra system will be improved, while 3d is the major addition to GeoGebra 5.0.
GeoGebra 4.2 (JNLP file),can be downloaded here and read its release notes can be viewed here.
GeoGebra 5.0 (JNLP file), can be downloaded here. If you have trouble running GeoGebra 5.0, be sure that 3d is running on your computer.