A mods list is posted in the permissions tab and I am currently updating and adding new mods. If you would like a mod added just post it in the discussion board and I will most likely get to it.
Type in the modpack name (OasisCraft) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select OasisCraft from the list on the left. The launcher will handle everything else!