Software

Event photo sharing platform and gallery with slideshow that allows guests to view and share memories via a QR code. ([Demo](https://demo.wedding-share.org/), [Source Code](https://github.com/Cirx08/WeddingShare))

Open-source gallery and CMS project. ([Source Code](https://github.com/zenphoto/zenphoto))

Conduct polls about dates, times or general questions. ([Demo](https://bitpoll.de/))

Flexible tournament system to build a tournament setup, add teams, schedule matches, keep track of scores and present ranking live to the public. ([Demo](https://www.bracketapp.nl/demo), [Source Code](https://github.com/evroon/bracket))

Create a simple place for your entire family to use to find gifts that people want, and to avoid double-gifting

The ultimate tool to interact with your audience (alternative to Slido, AhaSlides and Mentimeter). ([Source Code](https://github.com/ClaperCo/Claper))

Community-feedback tool for managing incoming feedback and prioritizing a public roadmap (alternative to Canny, UserVoice, Upvoty). ([Demo](https://product.clearflask.com), [Source Code](https://github.com/clearflask/clearflask))

A free, open-source expert system for guided interviews and document assembly, based on Python, YAML, and Markdown. ([Demo](https://demo.docassemble.org/run/legal), [Source Code](https://github.com/jhpyle/docassemble))

Open platform to collect and prioritize feedback (alternative to UserVoice). ([Demo](https://demo.fider.io), [Source Code](https://github.com/getfider/fider))

Experience Management Suite built on the largest open source survey stack worldwide. Gracefully gather feedback at every step of the customer journey to know what your customers need. ([Demo](https://app.formbricks.com), [Source Code](https://github.com/formbricks/formbricks))

Online service for planning an appointment or make a decision quickly and easily: Make a poll, Define dates or subjects to choose, Send the poll link to your friends or colleagues, Discuss and make a decision. ([Demo](https://framadate.org/aqg259dth55iuhwm), [Source Code](https://framagit.org/framasoft/framadate?))

Local community event and agenda sharing. ([Demo](https://demo.gancio.org/), [Source Code](https://framagit.org/les/gancio))

Self-destructing, shareable, no-registration event pages. ([Demo](https://gath.io/), [Source Code](https://github.com/lowercasename/gathio))

Form builder that allows anyone to create engaging conversational forms for surveys, questionnaires, quizzes, and polls. ([Source Code](https://github.com/heyform/heyform))

Manage complex group hierarchies with members, events and a lot more. ([Demo](https://demo.hitobito.com/en/users/sign_in), [Source Code](https://github.com/hitobito/hitobito))

Feature-rich web-based polling software. Supports extensive survey logic. ([Demo](https://demo.limesurvey.org), [Source Code](https://github.com/LimeSurvey/LimeSurvey))

Minimal events aggregator. ([Source Code](https://github.com/aaronpk/Meetable))

Federated tool that helps you find, create and organise events and groups. ([Source Code](https://framagit.org/framasoft/mobilizon/))

Beautiful open-source form builder. ([Demo](https://opnform.com/forms/create/guest), [Source Code](https://github.com/OpnForm/OpnForm))

Forward proxy server supporting proxy chaining, protocol inspection, MITM Interception, ICAP adaptation and transparent proxy. ([Source Code](https://github.com/bytedance/g3/tree/master/g3proxy))

Fast and secure standalone server for resizing and converting remote images. ([Source Code](https://github.com/imgproxy/imgproxy))

IPv4 over DNS tunnel solution, enabling you to start up a socks5 proxy listener. ([Source Code](https://github.com/yarrick/iodine))

A proxy server that runs a Shadowsocks instance for each access key and a REST API to manage the access keys. ([Source Code](https://github.com/OutlineFoundation/outline-server))

Non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk