Merely is an open source Discord bot framework. The example implementation of Merely-Framework (Merelybot) uses all of the included extensions for demonstration. Here is some highlighted commands;
/poll
to bring live polls to Discord/welcome
and /farewell
for custom server join/leave messages/clean
to quickly delete bot messages from a channel/language
to speak with the bot in another language
/
and choose Merely's command from the list.