Dynamic Languages Toolkit 0.9 and later require Eclipse Platform 3.3 or later. Optional DLTK components like Mylyn integration component or remote development with DSDP TM component may enforce additional requirements. Please check requirements section on download pages.
You may download DLTK from the DLTK Downloads page, or use Eclipse Update Manager with Dynamic Languages Toolkit Update Site: (Releases only). If you're on bleeding edge, integration and stable builds of DLTK 1.0 avaiable with Development Update Site: