I recently got to know the tool Sisulizer that is used to visualize both content and UI in order to know how to localize them too.
This tool seems to have some weaknesses, such as no auto-propagation or pre-translation features.
I was wondering if anyone knows better tools then that.
I have good experience working with both Passolo and Catalyst. I would recommend you to try your hand with Passolo.
I would also like to exploit this Email to know if anyone of you CAT Tools expert know how to incorporate a delta content into a CAT Tool where past translation is already store, in order to only incorporate , visualise and translate this delta.
Any CAT or TenT can do the task you describe. The already translated content will appear as full matches.