HermesEventBus is a library for using EventBus between processes, useful in IPC or plugin-in development. It has the same APIs as EventBus and easy to use.
An Android library automatically adds scroll up button to RecyclerView.
QuickScroll is a library aimed at creating similar scrolling experiences to the native Contacts app's People view. It has the same scrolling capabilities as the ListView's native fast-scroll, but comes with a much a much more customizable design, two indicator styles and an always visible scrollbar. The two most common modes are popup and indicator. Works seamlessly with ListView and ExpandableListView.