Some of your plug-in seems to be not up-to-dated; and other plug-in requires newer version of another ones.
My advice to you:
You need dowload eclipse once more.
and install software from SAP Development Tools for Eclipse
via eclipse: Help -> Install New Software
in filed work with enter: https://tools.hana.ondemand.com/kepler
(or luna) as you wish
It is guarantee that you will have up-to-dated plugins.
It will save your time if you will try to check version if every plug-in.
also you need to install graphiti plug ins
org.eclipse.graphiti
and you need to change Java Version in eclipse via:
window -> Preferences -> Java -> Compliler -> Compiler compliance level -> should be 1.6