Open Source Alternatives to Proprietary Software

SimplePie: Super-fast, easy-to-use, RSS and Atom feed parsing in PHP.

Meetsy

Create your own polls - Terminplaner 4.1

Easy!Appointments – Open Source Appointment Scheduler

Cal.com | Open Scheduling Infrastructure

Subhajit25Mondal/hashtag.io: Hashtag.io is a PHP based social networking website, which supports exclusive multimedia content, sharing and private or group messaging service.

Your free and decentralized audio platform - Funkwhale

Free HR Software | Open Source Human Resource Management Software

GitHub - maragkose/cosmos: COSMOS is a candidate/interview tracking platform

CandidATS download | SourceForge.net

The Leading Alternative Social Network | Minds

oTranscribe

GraphJS

Home - OpenCATS Applicant Tracking System

XCloner - Website Backup and Restore | Professional Backup application, Joomla backup extension, Wordpress backup plugin

Booked Scheduler - Free Trial

Diagram software | Diagram tool | Diagram editor

WebAnywhere: A Screen Reader On the Go