This is Cyclotis plugin for SDL Trados Studio 2011.

If you are using Studio 2014, you can use this plugin as well, but there is also a version specific to Studio 2014 which adds more features :

The version 2011 is not capable of retreiving properties from the environment : if another translator is using another client (for OmegaT or for Studio 2014) you will see the properties of his entries but you won't be able to add your own ones.

Theorically this version could work as well for Studio 2009, but it has not been tested.