AI (Artificial Intelligence) becomes boom now a days, every one want to become tony stark, but we face problem of Programming language, Knowledge of AI and Deep Learning and Various algorithm.
You may want to attend your Client or Customer but you may not able to attend them all in single time. You may also impress someone by making your own Virtual Assistant. If you are Software developer to develop and AI based Assistant then here is list of website may help you.
So here, I have listed online services, which provides you platform for making your own virtual assistant without having knowledge of deep technical stuff.
Jasper is an open source personal assistant written in Python that runs on the Raspberry Pi Model B. Control everything as per your voice 
Its Deep learning based AI services, which can identify object from video and Images.Clarifai has both a REST API that could be integrated with your preferred language along with a Python, Java and Node.js API. Their service is free for up to 5000 uses a month. 
 Fancy Hands
It is mix services by human as well as application to provide more efficiency and intelligence. The Fancy Hands SDK is available for Python, Ruby, Java, PHP, Node.js and Go.
If you’re working as team member then this application allows us to make robot for team work and provides timely quotes and responses. 
As per  Rebot.me is a great new service which basically allows you to create your own chat-bot for free.
Initially its free upto 100000 Requests. Its also Create Robot without codding and integrate with well kwon chatting platform like FB, Tweeter any many more.
Create easily fb Messenger using boat, it’s again provide free services but charges apply when you integrate with otherservices.
Provide Free Services up to 2500MSG/Month, It will rotation your data every 7 Days. Further detail given on pricing tab.
 Beep Boop
Its Paid services for Real time Virtual Assistant app.
 Telegram Bots
One of its best and newest features found in Telegram is that chatbots can run inside the messenger app itself.
Botkit is open-source toolkit for creating bots for messaging platforms. It provides a semantic interface to sending and receiving messages so developers. Source available at git-hub
 Kit Bot
Kit Bot is actually an SMS chatbot which “takes care” of your human relationships by asking questions about your daily activities with your friends 
It offers you a powerful natural language understanding & machine learning system that can break apart sentence structure and analyze the context of a conversation.
 IRC based Robot 
PircBot is a Java framework for writing IRC bots quickly and easily. Its features include an event-driven architecture to handle common IRC events. 
 A. L. I. C. E
A.L.I.C.E. (Artificial Linguistic Internet Computer Entity) is an award-winning free natural language artificial intelligence chat robot. The software used to create A.L.I.C.E. is available as free (“open source”) Alicebot and AIML software.
The friendly little AIML chatbot written in PHP with MySQL. Its support WordPress plugins also.Recently they launched API as well. 
if you have any similar link not listed here you can send me mail or comment here.
Citation [as on September 2016]
 https://www.sitepoint.com/five-simple-ways-to-build-artificial-intelligence-in-2016/ (Special Thanks)
 http://www.hongkiat.com/blog/tools-to-build-chatbots/ (Special Thanks)