ExchangeNow is a software script that allows users to launch their own cryptocurrency exchange platform. It is typically designed to include features such as support for multiple cryptocurrencies, a trading engine, an order book, and a user management system. The script can be customized to suit the needs of the user and can be integrated with various payment gateways and APIs.

WhatsAPI is an open-source PHP library that allows developers to interact with the WhatsApp Messenger service using the WhatsApp Web protocol. This library allows developers to create WhatsApp-based applications such as chatbots, automated message responders, and integration with other systems such as customer relationship management (CRM) platforms.

This library allows you to log in to a WhatsApp account, send and receive messages, make and receive voice and video calls, as well as send and receive files. It can handle multiple account simultaneously, by using different instances. It also has the ability to send message to a group.

WhatsAPI is a flexible tool that can be used for a variety of purposes, but it is important to note that it is intended for use by developers who are familiar with the PHP programming language, and it may not be suitable for non-technical users. Additionally, it is important to follow the terms of service and guidelines of WhatsApp, as the use of this library could be considered as a violation of their terms.