OpenAM - session Management/ Single signon

openAM is good open source tool for authentication and authorization to user for specific resource or product. This is built on Java and free to use. It supports token based management system(JAT) and all security mechanism. It exposes a list of REST API, which can be used for multi-purpose. Currently ForgeRock maintain this application. OpenAM can be downloaded from their site. openAM12.0 is stable released version by them. Also openAm13.0 is available those are nightbuilds.

https://forgerock.org/

http://www.ip-api.com/

IP address, DNS name and many other information can get from this site. This URL provides list of API for getting these thing.

simply copy and paste below URL on browser and get your complete details:

http://ip-api.com/json