mangossl

This plugin is designed to be used by mango accounting system users that are using woocommerce as their online point of sale 
and wishes to have the 2 systems synchronized.
mango-ssl plugin is sending WooCommerce orders changes to mango server (www.mangossl.com). The plugin is capturing all the 
order events (creation, update, cancellation) and send them in real time to mango for accounting and inventory management 
purpose. The order created or updated automatically from WooCommerce are kept ‘on Hold’ in mango until they are processed 
or completed. 
When an order is send from woocommerce to mango with static data details such as product or client that have not been declared 
on mango previously, those will be created automatically.

Mango ssl

Requires WooCommerce 3 or higher Stable tag: trunk Requires PHP: 5.6 License: GPLv2 or later License URI: http://www.gnu.org/licenses/gpl-2.0.

phreesoft

Bizuno RESTful API for WooCommerce is the connector that links your WordPress/WooCommerce store to the Bizuno Accounting/ERP system, so orders, customers, inventory, prices and payments stay in sync without manual exports or double entry.
It works with self-hosted Bizuno or PhreeSoft Cloud, and authenticates with a shared secret token so your store and your books can live on separate domains.
<h4>Why use it</h4>
<ul>
<li>WooCommerce to Bizuno orders — push WooCommerce orders into Bizuno as sales orders or invoices, automatically or on demand from the order screen.</li>
<li>Bizuno to WooCommerce inventory & prices — keep stock levels and pricing accurate across both platforms.</li>
<li>Customer sync — share customer records so you have one view across store and back office.</li>
<li>Bizuno shipping rates — optionally calculate WooCommerce shipping through Bizuno.</li>
<li>Secure token authentication — a shared <code>X-Bizuno-Token</code> secret over HTTPS; no store credentials are exposed.</li>
<li>Standalone — runs as an ordinary WordPress plugin; the Bizuno core library is not required on the store site.</li>
</ul>
This plugin is the companion to the Bizuno Accounting portal. Use it alongside self-hosted Bizuno or PhreeSoft Cloud for the complete e-commerce + accounting experience.
<h3>About PhreeSoft</h3>
PhreeSoft has built open-source accounting and ERP tools since creating PhreeBooks in 2007. Bizuno is our modern flagship, and this plugin connects your WooCommerce store to it.
<ul>
<li>https://www.phreesoft.com</li>
<li>https://www.bizuno.com</li>
<li>https://github.com/phreesoft/bizuno-restful-api-for-woocommerce</li>
</ul>

Bizuno RESTful API for WooCommerce

Real-time WooCommerce sync with Bizuno ERP & Accounting: push orders, pull inventory, prices and customers through a secure REST API.

Mango ssl vs Bizuno RESTful API for WooCommerce