I just upgraded to QGIS 2.0, and I have been unable to locate/use SEXTANTE tools. A search with the plugin installer does not turn up anything for "sextante." Any idea what is going on?
[GIS] How to install and run SEXTANTE for QGIS 2.0
qgisqgis-processingsextante-qgis-plugin
Related Solutions
You can find Sextante at http://plugins.qgis.org/plugins/plugins.xml.
Either download it from there and expand it to your .qgis/python/plugins folder, or add the address to your repositories. But I can not assure that it is working as expected on 1.7.3.
I have it configured and working well with QGIS 1.8. I decided to have SAGA in a folder without spaces. ( not sure if that affects function). Configuration screenshot attached. 
Best Answer
Sextante is now called
Processingand has become a core feature of QGIS 2.0.You can still load experimental versions of the plugin under it's new name.