PDT/Nightlies
To install PDT 3.5.* nightly builds, please use following Eclipse repository:
http://download.eclipse.org/tools/pdt/updates/3.5-nightly
Latest nightly is always available in following Eclipse repository:
http://download.eclipse.org/tools/pdt/updates/latest-nightly
Howto add repository into your Eclipse installation is explained in help [1]