Prawn is a pure Ruby PDF generation library that provides a lot of great functionality while trying to remain simple and reasonably performant. It provides support to do Vector drawing, including lines, polygons, curves, ellipses, etc. Extensive text rendering, Security features including encryption and password protection, PNG and JPG image embedding, with flexible scaling options and lot more.

Prawn - Fast, Nimble PDF Generation For Ruby

A library for creating, reading and editing .zip files with JavaScript, with a lovely and simple API.

JSZip - Create, read and edit .zip files with Javascript

Parity Ethereum's goal is to be the fastest, lightest, and most secure Ethereum client. Miners, service providers, and exchanges need fast synchronisation and maximum uptime. Parity Ethereum provides the core infrastructure essential for speedy and reliable services.

Parity Ethereum - The Fastest and most Advanced Ethereum Client

OsmAnd (OSM Automated Navigation Directions) is a map and navigation application with access to the free, worldwide, and high-quality OpenStreetMap (OSM) data. All map data can be stored on your device's memory card for offline use. Via your device's GPS, OsmAnd offers routing, with optical and voice guidance, for car, bike, and pedestrian. All the main functionalities work both online and offline (no internet needed).

Osmand - OSM Automated Navigation Directions

Gephi is the leading visualization and exploration software for all kinds of graphs and networks. It is fast Powered by a built-in OpenGL engine, Gephi is able to push the envelope with very large networks. Visualize networks up to a million elements. 

Gephi - The Open Graph Viz Platform

 AlertifyJS is a javascript framework for developing pretty browser dialogs and notifications. 

AlertifyJS - A javascript framework for developing pretty browser dialogs and notifications

A cross-platform, fast, feature full, GPU based terminal emulator. It offloads rendering to the GPU for lower system load and buttery smooth scrolling. Uses threaded rendering to minimize input latency. It supports all modern terminal features: graphics (images), unicode, true-color, OpenType ligatures, mouse protocol, hyperlinks, focus tracking, bracketed paste and several new terminal protocol extensions.
 
It also supports tiling multiple terminal windows side by side in different layouts without needing to use an extra program like tmux. It has Has multiple copy/paste buffers, like vim.

A cross-platform, fast, feature full, GPU based terminal emulator. It offloads rendering to the GPU for lower system load and buttery smooth scrolling. Uses threaded rendering to minimize input latency. It supports all modern terminal features: graphics (images), unicode, true-color, OpenType ligatures, mouse protocol, hyperlinks, focus tracking, bracketed paste and several new terminal protocol extensions.

kitty - A cross-platform, fast, feature full, GPU based terminal emulator

Rufus is a utility that helps format and create bootable USB flash drives. It can be especially useful for cases where you need to create USB installation media from bootable ISOs (Windows, Linux, UEFI, etc.), you need to flash a BIOS or other firmware from DOS, you need to work on a system that doesn't have an OS installed.
 
Features 
<ul>
<li>Format USB, flash card and virtual drives to FAT/FAT32/NTFS/UDF/exFAT/ReFS/ext2/ext3</li>
<li>Create DOS bootable USB drives, using <a href="https://www.freedos.org" rel="nofollow">FreeDOS</a> or MS-DOS (Windows 8.1 or earlier)</li>
<li>Create BIOS or UEFI bootable drives, including <a href="https://github.com/pbatard/uefi-ntfs">UEFI bootable NTFS</a></li>
<li>Create bootable drives from bootable ISOs (Windows, Linux, etc.)</li>
<li>Create bootable drives from bootable disk images, including compressed ones</li>
<li>Create <a href="https://en.wikipedia.org/wiki/Windows_To_Go" rel="nofollow">Windows To Go</a> drives</li>
<li>Create persistent Linux partitions</li>
<li>Download official Microsoft Windows 8 or Windows 10 retail ISOs</li>
<li>Compute MD5, SHA-1 and SHA-256 checksums of the selected image</li>
<li>Twice as fast as Microsoft's USB/DVD tool or UNetbootin, on ISO → USB creation (1)</li>
<li>Perform bad blocks checks, including detection of "fake" flash drives</li>
<li>Modern and familiar UI, with <a href="https://github.com/pbatard/rufus/wiki/FAQ#What_languages_are_natively_supported_by_Rufus">38 languages natively supported</a></li>
<li>Small footprint. No installation required.</li>
<li>Portable</li>
</ul>

Rufus is a utility that helps format and create bootable USB flash drives. It can be especially useful for cases where you need to create USB installation media from bootable ISOs (Windows, Linux, UEFI, etc.), you need to flash a BIOS or other firmware from DOS, you need to work on a system that doesn't have an OS installed.

Rufus - Create Bootable USB Flash Drive

Maddy Mail Server implements all functionality required to run a e-mail server. It can send messages via SMTP (works as MTA), accept messages via SMTP (works as MX) and store messages while providing access to them via IMAP. In addition to that it implements auxiliary protocols that are mandatory to keep email reasonably secure (DKIM, SPF, DMARC, DANE, MTA-STS). It replaces Postfix, Dovecot, OpenDKIM, OpenSPF, OpenDMARC and more with one daemon with uniform configuration and minimal maintenance cost.

Maddy - Composable all-in-one mail server

SymmetricDS is a database and file synchronization solution that is platform-independent, web-enabled, and database agnostic. SymmetricDS was built to make data replication across two to tens of thousands of databases and file systems fast, easy and resilient. It supports near real time, bi-directional data replication across large node networks over the WAN or LAN.

SymmetricDS - Multi Database Replication

Budibase is an open-source low-code platform, helping developers and IT professionals build, automate, and ship internal tools on their own infrastructure in minutes. Build and ship real software. Unlike other platforms, with Budibase you build and ship single page applications. Budibase applications have performance baked in and can be designed responsively, providing your users with a great experience.

Budibase - Low code platform that helps IT professionals build, automate and self-host internal tools in minutes

With the rise of government surveillance programs, Tox, a FOSS initiative, aims to be an easy to use, all-in-one communication platform that ensures full privacy and secure message delivery. Tox must use UDP simply because hole punching with TCP is not as reliable. However, Tox does use TCP relays as a fallback if it encounters a firewall that prevents UDP hole punching.
 
It helps to chat instantly across the globe with Tox's secure messages. It supports Encrypted voice calls, Screen sharing, File sharing, Video calls, Share with group or team. Tox has no central servers that can be raided, shut down, or forced to turn over data — the network is made up of its users.

With the rise of government surveillance programs, Tox, a FOSS initiative, aims to be an easy to use, all-in-one communication platform that ensures full privacy and secure message delivery. Tox must use UDP simply because hole punching with TCP is not as reliable. However, Tox does use TCP relays as a fallback if it encounters a firewall that prevents UDP hole punching.

Tox - The future of online communications.

Radicale is a free and open-source CalDAV and CardDAV server. It shares calendars and contact lists through CalDAV, CardDAV and HTTP, Supports events, todos, journal entries and business cards. It works out-of-the-box, no complicated setup or configuration required. It stores all data on the file system in a simple folder structure.

Radicale - A simple CalDAV (calendar) and CardDAV (contact) server

AntennaPod is a podcast player, you can download episodes and listen anywhere. You can even select podcasts that should be downloaded automatically.

AntennaPod - A podcast manager for Android

Ever Platform is a modern & open platform for On-Demand Economy and Digital Marketplaces. It supports Single-Store and Multi-Store / Multi-Vendor / Peer-to-Peer Marketplaces. It is a headless Commerce framework, which allows different implementations of store-fronts, Admin UIs and client apps. It exposes rich GraphQL, REST and WS APIs.
 
Its features include:
<ul>
<li>Mobile Ordering App for customers to make On-Demand orders (Hybrid / PWA, iOS and Android using Ionic / Ionic Native).&nbsp;</li>
<li>Customizing Shopping e-commerce Website for customers to make in-browser On-Demand purchases of food, goods or services</li>
<li>Merchant Tablet App for Stores/Merchants/Warehouses to manage &amp; track orders, organize deliveries, etc.</li>
<li>Admin Website used to manage all platform features and settings in the single Web-based interface</li>
<li>Products Catalogs (global and per Merchant) with Multiple Product Images</li>
<li>Inventory/Stock Management and Real-time Order Management/Processing across the Platform</li>
<li>Deliveries/Shipping management and processing across Platform (shipping with real-time location tracking for On-Demand orders)</li>
<li>Real-Time discounts, promotions and products/services availability updates</li>
<li>Gateway and Payment Processing&nbsp;</li>
</ul>

Ever Platform is a modern & open platform for On-Demand Economy and Digital Marketplaces. It supports Single-Store and Multi-Store / Multi-Vendor / Peer-to-Peer Marketplaces. It is a headless Commerce framework, which allows different implementations of store-fronts, Admin UIs and client apps. It exposes rich GraphQL, REST and WS APIs.

Ever Demand - Open-Source Commerce Platform for On-Demand Economy and Digital Marketplaces

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