The one and only

If you need one tool to manage all : custom post/types/taxonomy/fields and views for all of them. Clean metaboxes, cleanest code, polished plugin. Multiple extensions, some advanced ones must be paid (best investment I made, and license is not limited to one site).
Ie., the relationship plugin (free) made to establish bi-directionnal relations between posts<->pages<->CPT<->taxonomies was a lifesaver for me ??