Add: ETCD Manager (#2938)

* Added new opens source tool: ETCD Manager

* Fixed typo

* Updated ETCD Manager URL

The project is now sponsored by I-Cell Mobilsoft, so it has been move to a different repo.

Author: gtamas

README.md

@@ -759,6 +759,7 @@
 - [Daily](https://github.com/dailynowco/daily) - Curated dev news delivered to your new tab 👩🏽‍💻
 - [Laravel File Manager](https://github.com/alexusmai/laravel-file-manager) - Powerful file manager for Laravel
 - [Vue Crypto Dashboard](https://github.com/JayeshLab/vue-crypto-dashboard) - Cryptocurrency Dashboard made with Vue.js
+- [ETCD Manager](https://github.com/icellmobilsoft/etcdmanager) - A modern, efficient and free multi-platform ETCD GUI app based on Electron and VueJS.
 
 ### Commercial Products
  - [Wijmo](http://wijmo.com/products/wijmo-5/) - A collection of UI controls with VueJS support.