Website using the € symbol on their website - meaning it may accept payment in Euros.
Website using the ¥ symbol on their website - meaning it may accept payment in this South Korean currency.
A simple library that provides standard Unicode emoji support across all platforms.
A pingback is one of four types of linkback methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to, or referring to their articles.