Signal sends high-quality group, text, voice, video, document, and picture messages anywhere in the world. Signal messages and calls are always end-to-end encrypted and painstakingly engineered to keep your communication safe. 

Signal - Secure Messaging

 The Markdown-based note-taking app that doesn't suck. I couldn't find a note-taking app that ticked all the boxes I'm interested in: notes are written and rendered in GitHub-Flavored Markdown, no WYSIWYG, no proprietary formats, I can run a search & replace across all notes, notes support attachments, the app isn't bloated, the app has a pretty interface, tags are indefinitely nestable and can import Evernote notes (because that's what I was using before).

notable - The Markdown-based note-taking app that doesn't suck

Nosqlclient (Formerly Mongoclient) - Cross-platform and self hosted, easy to use, intuitive mongodb management tool. Its features include MongoDB Shell, Index management, User management, Schema analyzer, Live monitoring, File management and lot more.

Nosqlclient (Formerly Mongoclient) - Cross-platform and self hosted, easy to use, intuitive mongodb management tool

OSX-KVM runs El Capitan, macOS Sierra, High Sierra and Mojave on QEMU/KVM. It does not require an existing physical/virtual macOS installation. However it requires internet access during the macOS installation process. Offline macOS installations are also possible with the OSX-KVM project.

OSX-KVM - Run El Capitan, macOS Sierra, High Sierra and Mojave on QEMU/KVM

Wiki.js is the most powerful and extensible open source Wiki software. It works on virtually any platform and is compatible with either PostgreSQL, MySQL, MariaDB, MS SQL Server or SQLite. It can manage all aspects of your wiki using the extensive and intuitive admin area. You can keep wiki public, completely private or a mix of both.
 
Wiki.js is bundled with lot of features, 

<UL>
<li>It has built-in support for 2FA, Social authentication</li>
<li>All content modifications are tracked. You can revert to a previous state or recover a deleted page at any time. Easily keep track of who changed what</li>
<li>Visually compare two versions of the same page to see exactly what changed.</li>
<li>Quickly export a specific version of a page or create a new page from an older version.</li>
<li>Multi language support: Make your wiki available in multiple languages. Quickly switch between languages for the same page.</li>
<li>Right-to-left languages are fully supported.</li>
<li>Upload and manage your media assets from the Assets Manager. Easily categorize your assets in folders and see where they are used.</li>
<li>Insert code snippets with full color syntax Highlighting and line numbering.</li>
<li>Full text search support using Elastic search </li>
<li>Store the content in Git, Personal cloud, Enterprise Cloud Storage, Local network</li>
<li>Manage users and groups </li>
<li>Create your own themes to fully change the look and feel of your wiki</li>
</ul>

Wiki.js is the most powerful and extensible open source Wiki software. It works on virtually any platform and is compatible with either PostgreSQL, MySQL, MariaDB, MS SQL Server or SQLite. It can manage all aspects of your wiki using the extensive and intuitive admin area. You can keep wiki public, completely private or a mix of both.


Wiki.js - The most powerful and extensible open source Wiki software

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

HedgeDoc (formerly known as CodiMD) is an open-source, web-based, self-hosted, collaborative markdown editor. You can use it to easily collaborate on notes, graphs and even presentations in real-time. All you need to do is to share your note-link to your co-workers and they’re ready to go.

HedgeDoc - The best platform to write and share markdown

MASSCAN is Mass IP port scanner. This is the fastest Internet port scanner. It can scan the entire Internet in under 6 minutes, transmitting 10 million packets per second. It produces results similar to nmap, the most famous port scanner. Internally, it operates more like scanrand, unicornscan, and ZMap, using asynchronous transmission. The major difference is that it's faster than these other scanners. In addition, it's more flexible, allowing arbitrary address ranges and port ranges.

MASSCAN - TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes

NocoDB is an open source Airtable alternative. NocoDB works by connecting to any relational database and transforming them into a smart spreadsheet interface! This allows you to build no-code applications collaboratively with teams. NocoDB currently works with MySQL, PostgreSQL, Microsoft SQL Server, SQLite, Amazon Aurora & MariaDB databases.
 
Also NocoDB's app store allows you to build business workflows on views with combination of Slack, Microsoft Teams, Discord, Twilio, Whatsapp, Email & any 3rd party APIs too. Plus NocoDB provides programmatic access to APIs so that you can build integrations with Zapier / Integromat and custom applications too.

NocoDB is an open source Airtable alternative. NocoDB works by connecting to any relational database and transforming them into a smart spreadsheet interface! This allows you to build no-code applications collaboratively with teams. NocoDB currently works with MySQL, PostgreSQL, Microsoft SQL Server, SQLite, Amazon Aurora & MariaDB databases.





NocoDB - The Open Source Airtable alternative

"Firefly III" is a (self-hosted) manager for your personal finances. It can help you keep track of your expenses and income, so you can spend less and save more. Firefly III supports the use of budgets, categories and tags. It can import data from external sources and it has many neat financial reports available. 
 
It supports a double-entry bookkeeping system, You can store, edit and remove withdrawals, deposits and transfers, Manage different types of accounts, View income / expense reports

"Firefly III" is a (self-hosted) manager for your personal finances. It can help you keep track of your expenses and income, so you can spend less and save more. Firefly III supports the use of budgets, categories and tags. It can import data from external sources and it has many neat financial reports available. 

Firefly III - A personal finances manager

Jam is an open source alternative to Clubhouse, Twitter Spaces and similar audio spaces. With Jam you can create audio rooms that can be used for panel discussions, jam sessions, free flowing conversations, debates, theatre plays, musicals and more. The only limit is your imagination.

Jam - Clubhouse for mini conferences, friends, communities

Dendron is an open-source, local-first, markdown-based, note-taking tool. It's a personal knowledge management solution (PKM) built specifically for developers and integrates natively with IDEs like VS Code and VSCodium.
 
Most PKM tools help you create notes but slam into a wall retrieving them once your knowledge base reaches a certain size threshold. That threshold varies with the tool, but virtually everything stops working past 10k notes unless the user was extremely diligent about organizing their knowledge. Past this threshold, entropy wins and every query becomes a keyword search and scrolling through pages of results. 
 
Dendron's mission is to help humans organize, find, and work with any amount of knowledge. It not only helps you create notes but also retrieve them retrieval works as well with ten notes as it does with ten thousand.

Dendron is an open-source, local-first, markdown-based, note-taking tool. It's a personal knowledge management solution (PKM) built specifically for developers and integrates natively with IDEs like VS Code and VSCodium.

Dendron - The personal knowledge management (PKM) tool that grows as you do!

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

openMAINT is an application for the management of buildings, installations, movable assets and related maintaining activities. It helps the managing authority to know, organize and update those data related to the asset inventory, in order to support their decision and operative procedures. Its feature include Space & Asset Inventory, Facility Maintenance, Logistic Management, Economic Management, Energy & Environment, GIS & BIM support.

openMAINT - Property and Facility Management

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