listmonk is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL database as its data store. It has been in active use at zerodha.com for several months where it has processed hundreds of campaigns and tens of millions of e-mails.
 
More than just e-mail campaigns. Connect messenger web services and send SMS, Whatsapp, FCM notifications, or any arbitrary message campaigns. Create powerful, dynamic e-mail templates with the Go templating language. Use template expressions and logic in subject lines and content. Write HTML e-mails with a WYSIWYG editor, Markdown, raw syntax-highlighted HTML, or just plain text. Use the media manager to upload and link images in e-mail campaigns on the server's filesystem or S3.

listmonk is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL database as its data store. It has been in active use at zerodha.com for several months where it has processed hundreds of campaigns and tens of millions of e-mails.

Listmonk - High performance, self-hosted newsletter and mailing list manager with a modern dashboard

PhotoPrism is a self hosted app for browsing, organizing, and sharing your photo collection. It makes use of the latest technologies to tag and find pictures automatically without getting in your way. It provides support to do reverse geocoding and automated tagging based on Google TensorFlow.

PhotoPrism - Personal Photo Management powered by Go and Google TensorFlow

Pirsch is a simple, cookie-free, and open-source web analytics solution that easily integrates into your website or backend.
Pirsch generates a unique fingerprint for each visitor. The fingerprint is a hash of the visitors IP address, User-Agent, the date, and a salt. The tracking works without invading the visitor's privacy. It doesn't use cookies and no personal information is stored, making it GDPR-, CCPA-, and PECR-compliant. If used on the server-side, Pirsch can track visitors using ad blockers.
You can receive detailed insights on all your numbers in real-time. Filter statistics with a single click and connect to Google Search Console to see what searches led people to your website without leaving your dashboard.
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Pirsch is a simple, cookie-free, and open-source web analytics solution

Pirsch - Simple, cookie-free, and open-source web analytics solution

K6 is a load testing tool built for engineering teams. The k6 API and CLI are easy-to-use, flexible and powerful. Create tests faster with our test builder, recorder or converters. Automate your tests to ensure that your infrastructure and application remain performant. Write tests in Javascript that mimic real-world scenarios. It has HTTP/1.1, HTTP/2, WebSocket and gRPC protocol support. 



K6 - A modern load testing tool, using Go and JavaScript

Documize Community is an open source modern, lightweight alternative to Confluence. It is built for technical and non-technical users, Designed to unify both customer-facing and internal documentation. It supports Organization through labels, spaces and categories. 

Documize Community - Modern Confluence alternative designed for internal & external docs, built with Golang + EmberJS

brig is a distributed & secure file synchronization tool with version control. It is based on ipfs, written in Go. It supports Simplified git version control, Sync algorithm that can handle moved files and empty directories and files, Encryption of data in rest and transport + compression on the fly and lot more.

brig - A file synchronization tool on top of ipfs (and more!)

Niltalk is a web based disposable chat server. It allows users to create password protected disposable, ephemeral chatrooms and invite peers to chat rooms. Rooms can be disposed of at any time. It supports in-memory / file / Redis as the backend for persisting room and session states.

Niltalk - A multi-room disposable chat service written in Go that uses WebSockets for live communication

Aether is a peer-to-peer network of independent, self-moderated communities. It is a Open source, self-governing communities with auditable moderation and mod elections. Aether is private by default, so that you can choose to be fully private, or fully public yourself. Most people use pseudonyms, though you can use your real name, or company. 
 
 Actions of moderators are visible to users. No content can just 'disappear', if something gets deleted, you'll know who did it, why they did it, and if you want, how to get it back. Communities can elect and impeach their own mods by voting. If a mod behaves inappropriately, users can disable that mod locally as well.

Aether is a peer-to-peer network of independent, self-moderated communities.  It is a  Open source, self-governing communities with auditable moderation and mod elections. Aether is private by default, so that you can choose to be fully private, or fully public yourself. Most people use pseudonyms, though you can use your real name, or company. 

Aether - peer-to-peer network of independent, self-moderated communities

sidekick is a high-performance sidecar load-balancer. By attaching a tiny load balancer as a sidecar to each of the client application processes, you can eliminate the centralized loadbalancer bottleneck and DNS failover management. sidekick automatically avoids sending traffic to the failed servers by checking their health via the readiness API and HTTP error returns.

Sidekick - High Performance HTTP Sidecar Load Balancer


CrypTag is an idea, a spec, an API, and a piece of software that makes it easy to build a zero-knowledge system, which means that the server holding user data doesn't know what it is (since it's encrypted).
 
It is meant as a primitive to be used to build more sophisticated systems that would rather not re-implement the pieces necessary to build a zero-knowledge system, but several useful command line applications have been built with it so far, namely cput (for encrypting/saving files), cget (for fetching/decrypting files), and cpass (CryptPass, a password manager).

CrypTag is an idea, a spec, an API, and a piece of software that makes it easy to build a zero-knowledge system, which means that the server holding user data doesn't know what it is (since it's encrypted).

Cryptag - Encrypted, taggable, searchable cloud storage

GoToSocial is a Fediverse server project, written in Golang. It provides an alternative to existing projects such as Mastodon, Pleroma, Friendica, PixelFed etc. One of the key differences between GoToSocial and those other projects is that GoToSocial doesn't include an integrated front-end (ie., a webapp). Instead, like the Matrix.org's Synapse project, it provides only a server implementation and a well-documented API. On this API, developers are free to build any front-end implementation or mobile application that they wish.

GoToSocial - Fediverse server project

Hammond is a self hosted vehicle management system to track fuel and other expenses related to all of your vehicles. It supports multiple users sharing multiple vehicles. It is the logical successor to Clarkson which has not been updated for quite some time now.

Hammond - Self hosted vehicle management system to track fuel and other expenses related to all of your vehicles

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