Add PartKeepr (#684)

* Add PartKeepr

electronic parts inventory managment

* PartKeepr

fixed

README.md

@@ -654,6 +654,7 @@ See also <https://en.wikipedia.org/wiki/List_of_streaming_media_systems>, <https
   * [IHateMoney](http://ihatemoney.org/) - Manage your shared expenses, easily. ([Source Code](https://github.com/spiral-project/ihatemoney)) `BSD` `Python`
   * [Tryton](http://www.tryton.org/) - Core base of a complete business solution (ERP). ([Demo](http://demo.tryton.org) admin/admin, [Source Code](https://hg.tryton.org)) `GPLv3` `Python`
   * [Koha](https://koha-community.org/) - Fully featured, scalable library management system (integrated library system - ILS). ([Source Code](https://github.com/Koha-Community/Koha)) `GPLv3` `Perl`
+  * [PartKeepr](https://www.partkeepr.org) - PartKeepr is an electronic part inventory management software. It helps you to keep track of your available parts and assist you with re-ordering parts. ([Demo](https://demo.partkeepr.org/), [Source Code](https://github.com/partkeepr/PartKeepr)) `GPLv3` `PHP`
   * [StockazNG](https://dev.sigpipe.me/dashie/StockazNG) - Asset Management System. `MIT` `Python`