Plugin shows actually free champions rotation for League of Legends in widget.
This plugin provides shortcodes related to League of Legends.
This plugin will add a widget that shows the current League of Legends free-to-play champions.
League Codes is a plugin that provides information about the League of a summoner with help of the "League of Legends" Mashape API.
LoL Tracker is a set of tools relating your league of Legends account.