From Elite Wiki
The OXZ list lives on the http://www.oolite.space/ website.
Click here: http://www.oolite.space/oxps/
They are usually listed in order of recency, but clicking at the top of each column changes the listing order.
- OXZ's are the newer format for OXP's and are managed by the in-game Expansions Manager. They date back to 2014.
- OXP's are now used for experiments, for personally tweaked OXZ's & for the older (original) Oolite expansions. They live in the AddOns folder and must be personally managed. See OXP for details. See OXP List (better known) & Guide to Unlisted OXPs (more obscure) for lists.