GalalAly

Still a beta version.
A WordPress and WooCommerce plugin/extension that allows users to add their own currencies.
You can also define conversion rates for your custom currency (if it is not supported by PayPal) to use PayPal gateway through another supported currency like USD or GBP.
The officially supported gateway for conversions is the PayPal gateway that comes with WooCommerce by default.
Refunds are not yet supported.
New version supports only WordPress 4.0 and WooCommerce 2.2

WooCommerce Custom Currencies

Add your currency to list of supported currencies in WooCommerce

dnolbon

Automatically download and show currency rate between two currencies from various banks.
Available bank list
<ul>
<li>Национальный Банк Республики Беларусь (Belarus central bank)</li>
<li>Eesti Pank (Estonian central bank)</li>
<li>European Central Bank</li>
<li>Lietuvos bankas (EU) (Lithuanian central bank, european rates)</li>
<li>Lietuvos bankas (LT) (Lithuanian central bank)</li>
<li>Latvijas banka (Latvian central bank)</li>
<li>Центральный банк Российской Федерации (Russian central bank)</li>
<li>ПриватБанк (Ukrainian PrivatBank)</li>
</ul>
<h4>Usage</h4>
[currencieconvert from=USD to=EUR]
[currencieconvert from=USD to=EUR decimals=4]

CurrenciesWp

Automatically download and show currency rate between two currencies from various banks.

WooCommerce Custom Currencies vs CurrenciesWp