Pandorabotss Playground is a free, integrated development environment for building chatbots loaded with features and tools. The Pandorabots API allows you to integrate our bot hosting service and natural language processing engine into your own application. The current offering allows you to create a bot, upload files, compile, talk to a bot (in a variety of ways), and delete a bot.You can get started here.
The Pandorabots API also provides API access to the bot hosting platform. Pandorabots also offers free SDKs on Github, and a free integrated development environment for building chatbots with AIML 2.0