MIGX

MIGX (multiItemsGridTv for modx) is a custom-tv-input-type for adding multiple items into one TV-value and a snippet for listing this items on your frontend.

It has a cofigurable grid and a configurable tabbed editor-window to add and edit items.

Each item can have multiple fields. For each field you can use another tv-input-type.

See the official documentation here: http://rtfm.modx.com/display/addon/MIGX