Accounting.js - A lightweight JavaScript library for number, money and currency formatting - fully localisable, zero dependencies.

•    Javascript

accounting.js is a tiny JavaScript library for number, money and currency parsing/formatting. It's lightweight, fully localisable, has no dependencies, and works great client-side or server-side. Use standalone or as a nodeJS/npm and AMD/requireJS module.

fixer.io - A foreign exchange rates and currency conversion API

•    Ruby

Fixer.io is a free JSON API for current and historical foreign exchange rates published by the European Central Bank.The rates are updated daily around 4PM CET.

fixer - A foreign exchange rates and currency conversion API

•    Ruby

We are happy to announce the complete relaunch of fixer.io into a more stable, more secure, and much more advanced currency & exchange rate conversion API platform. While the core structure of our API remains unchanged, all users of the legacy Fixer API will be required to sign up for a free API access key and perform a few simple changes to their integration. To learn more about the changes that are required, please jump to the „Required Changes“ section below. As of March 6th 2018, the legacy Fixer API (api.fixer.io) is deprecated and a completely re-engineered API is now accessible at https://data.fixer.io/api/ The core structure of the old API has remained unchanged, and you will only need to perform a few simple changes to your integration.

swap - :currency_exchange: Currency exchange rates library

•    PHP

Swap allows you to retrieve currency exchange rates from various services such as Fixer, currencylayer or 1Forge and optionally cache the results. It is integrated to other libraries like moneyphp/money and provides a Symfony Bundle and a Laravel Package. We recommend to use the services that support our project, providing a free plan up to 1,000 requests per day.

money - PHP implementation of Fowler's Money pattern.

•    PHP

In short: You shouldn't represent monetary values by a float. Wherever you need to represent money, use this Money value object. Since version 3.0 this library uses strings internally in order to support unlimited integers. PHP 5.6+. Other than that, this library has no external requirements. MoneyPHP will not provide any support to PHP versions that are not supported by the language itself. There might be additional dependencies for specific feature, e.g. the Swap exchange implementation, check the documentation for more information.

JavaMoney - Money and Currency API for Java

•    Java

JavaMoney is the new monetary API for the Java Platform as well as related projects and libraries. Whereas the API (JSR 354) provides a portable and extensible API for handling of Money & Currency models, Moneta provides a production ready reference implementation.

money - Library for dealing with money and currency conversion

•    Ruby

Library for dealing with money and currency conversion

Rippled - Decentralized cryptocurrency blockchain daemon implementing the XRP Ledger in C++

•    C++

Ripple is a network of computers which use the Ripple consensus algorithm to atomically settle and record transactions on a secure distributed database, the Ripple Consensus Ledger (RCL). Because of its distributed nature, the RCL offers transaction immutability without a central operator. The RCL contains a built-in currency exchange and its path-finding algorithm finds competitive exchange rates across order books and currency pairs.

google_currency - Ruby Money::Bank interface for the Google Currency exchange data

•    Ruby

Ruby Money::Bank interface for the Google Currency exchange data

autoNumeric

•    JQuery

autoNumeric is a jQuery plugin that automatically formats currency (money) and numbers as you type on form inputs. It supports most International numeric formats and currency signs including those used in Europe, North and South America, Asia and India (lakhs**).

accounting - money and currency formatting for golang

•    Go

FormatMoney is a function for formatting numbers as money values, with customisable currency symbol, precision (decimal places), and thousand/decimal separators.FormatMoney supports various types of value by runtime reflection. If you don't need runtime type evaluation, please refer to FormatMoneyInt, FormatMoneyBigRat, FormatMoneyBigRat, or FormatMoneyFloat64.

A simple ASP.NET Currency / Money TextBox User Control

A ASP.NET TextBox control used with AJAX maskeditextender makes it possible to enter numbers but it's not very intuitive to use. CurrencyTextBox control is a user control on top of TextBox to allow easy entry/update of money / currency values. 9/12/2010: Updated with some fixes.

Money - Swift value types for working with money & currency

•    Swift

Money is a Swift framework for iOS, watchOS, tvOS and OS X. It provides types and functionality to represent, calculate and convert money in the 298 ISO currencies.

Taler - Electronic payments for a liberal society

•    C

Taler is a new electronic payment system. When you pay with Taler, your identity does not have to be revealed to the merchant. The bank, government and exchange will also never learn how you spent your electronic money. However, you can prove that you paid in court if necessary.

Money - A precise, type-safe representation of a monetary amount in a given currency.

•    Swift

A precise, type-safe representation of monetary amounts in a given currency. This functionality is discussed in Chapter 3 of Flight School Guide to Swift Numbers.

Vertcoin - Decentralized currency owned by its users

•    C++

Vertcoin is a digital currency that can be sent between people over the internet. Vertcoin (VTC) stays true to the original vision of cryptocurrency: a financial system owned by its users, the people’s coin. Vertcoin is not controlled by large banks or mining hardware manufacturers and can be mined by anyone profitably. Fairly distributed without a premine, ICO or airdrop, Vertcoin is developed by community members working as volunteers and the project is wholly funded by donations. A finite resource similar to gold, you can rest assured that Vertcoin will keep your money safe from vested interests and ensure that transaction fees are proportionate and shared between a large number of miners. With Vertcoin, you can truly be your own bank.

AllAboutForex - Money Changer

The 'AllAboutForex' aims at developing a web site for firms which are involved in currency exchange business. 'AllAboutForex'gives a broad idea about various instruments in Money market like currencies, travellers cheques,quick moeny transfers etc. Also covers FAQs on Forex.

Litecoin - Global Decentralized Currency

•    C++

Litecoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Litecoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Litecoin Core is the name of open source software which enables the use of this currency.

SmartStoreNET - Open Source ASP.NET MVC Ecommerce Shopping Cart Solution

•    CSharp

SmartStore.NET is a free, open source, full-featured e-commerce solution for companies of any size. It is web standards compliant and incorporates the newest Microsoft web technology stack.SmartStore.NET includes all essential features to create multilingual and multi-currency stores targeting desktop or mobile devices and enabling SEO optimized rich product catalogs with support for an unlimited number of products and categories, variants, bundles, datasheets, ESD, discounts, coupons and many more.

go-money - Go implementation of Fowler's Money pattern

•    Go

GoMoney provides ability to work with monetary value using a currency's smallest unit. Package allows you to use basic Money operations like rounding, splitting or allocating without losing a penny. You shouldn't use float for monetary values, since they always carry small rounding differences.