Botlist is described as 'provides a directory of bots available for services like Slack, Facebook and more. It's an easy way for developers to find bots to help simplify their tasks' and is an website in the Online Services category. There are eight alternatives to Botlist, not only websites but also apps for Slack. The best alternative is Slack App Directory, which is free. Other great sites and apps similar to Botlist are BotArena (Free), BotPages (Free), BotsBook (Free) and There Is A Bot For That (Free).
BotsBook.com is a catalog of useful bots for main messenger platforms such as slack, skype, telegram and facebook messenger. It's like imdb - but for bots... You may add a bot absolutly for free to this catalog.