XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
xCurrency - Smart Currency - A simple ads-free currency converter.
Yahoo! Finance - Currencies Center - Currency Converter from Yahoo! Finance.
Grafana - Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases
Currencies - An exchange rates currency converter for Android
Time Zones Converter - Time Zones Converter is an application which as the name implies, is used for converting time zones.