Complex sentence: A Bottler is an IRC client (or a plugin for an IRC client) that scans text sent from IRC offer bots such as XDCC offers, and also queries bots for file lists.
Split into simpler sentences: A Bottler is an IRC client (or a plugin for an IRC client) that scans text sent from IRC. It offer bots such as XDCC bots and also queries bots for file lists.