added agile estimation software "PartyPoker" to "Software Development - Project Management" (#3025)

README.md

@@ -1741,6 +1741,7 @@ _See also: [awesome-sysadmin/Code Review](https://github.com/awesome-foss/awesom
 - [OneDev](https://onedev.io/) - All-In-One DevOps Platform. With Git Management, Issue Tracking, and CI/CD. Simple yet Powerful. ([Source Code](https://code.onedev.io/projects/160)) `MIT` `Java`
 - [OpenProject](https://www.openproject.org) - OpenProject is a web-based project management system. ([Source Code](https://github.com/opf/openproject)) `GPL-3.0` `Ruby`
 - [Pagure](https://pagure.io/pagure) - A lightweight, powerful, and flexible git-centric forge with features laying the foundation for federated and decentralized development. ([Demo](https://pagure.io/)) `GPL-2.0` `Python`
+- [Party Poker](https://github.com/kksoftwareag/partypoker) - Agile / Scrum Planning Poker WebApp. Estimate User Stories in real time. ([Demo](https://planningpoker.party)) `MIT` `C#`
 - [Phproject](https://www.phproject.org/) - High performance full-featured project management system. ([Source Code](https://github.com/Alanaktion/phproject)) `GPL-3.0` `PHP`
 - [ProjeQtOr](https://www.projeqtor.org/) - A complete, mature, multi-user project management system with extensive functionality for all phases of a project. ([Demo](https://demo.projeqtor.org/), [Source Code](https://sourceforge.net/p/projectorria/code/HEAD/tree/branches/)) `AGPL-3.0` `PHP`
 - [Re:Backlogs](https://github.com/kaishuu0123/rebacklogs) - Project management and collaboration tool powered by Ruby on Rails & VueJS. ([Demo](https://rebacklogs.saino.me/users/sign_up)) `MIT` `Ruby`