Your digital reading pile can get as disorganized as that stack of magazines on the nightstand, especially if you use more than one service. ReadKit streamlines your reading with offline support for Instapaper, Pocket, and Readability, plus bookmarks from Pinboard and Delicious. (Pinboard and Instapaper require paid accounts.) ReadKit lists each account in the sidebar, including categories such as Delicious and Pinboard’s private folders, and the way Pocket splits your entries into Articles, Videos, and Images. Mouse over a service’s name and select Hide to collapse the lists.