# OpenFly Tech Hub - UAV & Low-Altitude Technology Index
> Global Index of UAV Software, Flight Control, Datasets, AI Models, Hardware, Regulations, and Engineering Guides.

## Technical Resource Directory

- [PX4/PX4-Autopilot](https://openfly.win/resources/px4-autopilot.html): PX4 Autopilot Software (Type: flight_stack, Category: flight_control, License: BSD-3-Clause)
- [ArduPilot/ardupilot](https://openfly.win/resources/ardupilot.html): ArduPlane, ArduCopter, ArduRover, ArduSub source (Type: flight_stack, Category: flight_control, License: GPL-3.0)
- [mavlink/qgroundcontrol](https://openfly.win/resources/qgroundcontrol.html): Cross-platform ground control station for drones (Android, iOS, Mac OS, Linux, Windows) (Type: gcs, Category: gcs_ground_station, License: Apache-2.0)
- [mavlink/mavlink](https://openfly.win/resources/mavlink.html): Marshalling / communication library for drones. (Type: solution_recipe, Category: communication_links, License: Unstated/Unknown)
- [gazebosim/gz-sim](https://openfly.win/resources/gazebo-sim.html): Open source robotics simulator. The latest version of Gazebo. (Type: simulator, Category: simulation_digital_twin, License: Apache-2.0)
- [VisDrone/VisDrone-Dataset](https://openfly.win/resources/visdrone-dataset.html): The dataset for drone based detection and tracking is released, including both image/video, and annotations.  (Type: dataset, Category: perception_ai, License: Unstated/Unknown)
- [ultralytics/ultralytics](https://openfly.win/resources/ultralytics.html): Ultralytics YOLO26, YOLO11, YOLOv8 — object detection, instance segmentation, semantic segmentation, image classification, pose estimation, object tracking (Type: model, Category: perception_ai, License: AGPL-3.0)
- [betaflight/betaflight](https://openfly.win/resources/betaflight.html): Open Source Flight Controller Firmware (Type: flight_stack, Category: flight_control, License: GPL-3.0)
- [OpenDroneMap/ODM](https://openfly.win/resources/opendronemap.html): A command line toolkit to generate maps, point clouds, 3D models and DEMs from drone, balloon or kite images. 📷 (Type: tool, Category: mapping_and_survey, License: AGPL-3.0)
- [paparazzi/paparazzi](https://openfly.win/resources/paparazzi.html): Paparazzi is a free and open-source hardware and software project for unmanned (air) vehicles. This is the main software repository. (Type: flight_stack, Category: flight_control, License: GPL-2.0)

## Curated Tech Collections

- [Flight Control Stacks](https://openfly.win/collections/flight-control-stacks.html): Official autopilot repositories and flight-control software. (Audience: UAV engineers)
- [GCS and Telemetry Protocols](https://openfly.win/collections/gcs-and-protocols.html): Ground-control and MAVLink protocol repositories. (Audience: UAV engineers)
- [Simulation and Mapping](https://openfly.win/collections/simulation-and-mapping.html): Repositories used for simulation, mapping and survey workflows. (Audience: UAV engineers)
- [Aerial Perception](https://openfly.win/collections/aerial-perception.html): Source-backed aerial dataset and model repositories. (Audience: UAV engineers)

## Engineering & Validation Guides

- [How to Review a Source-Backed UAV Resource](https://openfly.win/guides/source-backed-resource-review.html): A checklist for checking provenance, license evidence and update time. (Type: validation)
- [Comparing Flight-Stack Repositories](https://openfly.win/guides/flight-stack-repository-comparison.html): A source-linked starting point for comparing flight-control repositories. (Type: comparison)
- [Tracing MAVLink and GCS Dependencies](https://openfly.win/guides/mavlink-gcs-source-trace.html): Trace the protocol and GCS repositories before selecting an integration path. (Type: architecture)
- [Reviewing Aerial AI and Dataset Sources](https://openfly.win/guides/aerial-ai-evidence-review.html): A provenance-first review flow for aerial datasets and model repositories. (Type: validation)

## API & Machine Access
- JSON Directory: https://openfly.win/api/resources.json
- Update Events RSS: https://openfly.win/feed.xml
- Search Index: https://openfly.win/api/search_index.json
- Associated News Feed: https://news.regoose.cc