Chatbot

https://chatfuel.com/

https://azure.microsoft.com/en-us/services/cognitive-services/qna-maker/
https://cloud.google.com/dialogflow-enterprise/

https://sendbird.com/
https://www.pandadoc.com/

Java Chart

https://github.com/timmolter/xchart
http://www.jzy3d.org/
http://jcharts.sourceforge.net/

https://sourceforge.net/projects/jfreechart/files/

7z Self Extracting Installer

https://stackoverflow.com/questions/27904532/how-do-i-make-a-self-extract-and-running-installer
http://ntsblog.homedev.com.au/index.php/2015/05/14/self-extracting-archive-runs-setup-exe-7zip-sfx-switch/

https://sevenzip.osdn.jp/chm/cmdline/switches/sfx.htm