Three Island

Three Island allows you to hover over PokéPaste URLs to preview their contents. It also supports importing teams with a single click, copying sets to the clipboard, and support in various displays (chatrooms, battle rooms, and PMs) as well as all official clients. You can check out the codebase at https://github.com/PartMan7/Three-Island, and there's an FAQ in the README (https://github.com/PartMan7/Three-Island#frequently-asked-questions)