Blogger is a blog-publishing service that allows multi-user blogs with time-stamped entries.
Buy me a coffee is a service for online content creators that they may use to receive tips and donations to support their work.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OpenGSE is a test suite used for testing servlet compliance. It is deployed by using WAR files that are deployed on the server engine.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.