Convert any given WooCommerce shop currency to allowed PayPal currencies for PayPal's Payment Gateway within WooCommerce on checkout.
Currency Converter shortcode and widget for wordpress
Live Forex Table plugin displays unlimited foreign exchange rate in tabular format based on Google Finance.
Exchange rate informer for WordPress
"Serbian Dinar Exchange Rates" gives the users from Serbia currency exchange rate widget.
Add this widget at your sidebar to display a currency converter.
Widget that lets you to make currency covertions in your blog