When I upgraded to KDE5 I missed simple little desktop widget displaying foreing currencies price. There are a lot of widgets for KDE4 exist but there is nothing available for KDE5. So I decided to create my own plasmoid:
Plasmoid is pretty minimalistics. A few currencies pairs can be set in preferences. Widget shows every symbol and price in a separate line. Prices are updated every 15 minutes. When you click on the line with the price then the browser with Finance Yahoo with selected currency pair is opened.
Data are downloaded from http://download.finance.yahoo.com/d/quotes.csv.
Pair names examples: