Free Software
Crystal
A free and open general-purpose, object-oriented programming language developed by Ary Borenszweig, Juan Wajnerman, Brian Cardiff and a community with over 300 contributors. Crystal is statically type checked, which means that all code errors will be caught at compile time, rather than fail on runtime. Crystal provides an easy-to-learn syntax similar to Ruby, while at the same time producing performance similar to that of the programming language C.
gThumb
gThumb is a free and open-source image viewer and Image organizer for the GNOME Desktop. The software can be used to view, orginize and edit BMP, GIF, ICO, JPEG, PNG, TIFF, XPM files. An importer tool is also include, it can be used for transferring photos from cameras. With the editing tool, photos can be rotated, flipped and cropped, or optimized for the right contrast ratio. gThumb is developed by the The GNOME Project and released under the GNU General Public License.
Momentum Framework
Momentum is an open-source framework for building enterprise server-side Deno applications in TypeScript. It provides the paradigms and design patterns to guide developers to create robust, scalable, and enterprise-grade applications. By focusing on a batteries-optional approach, Momentum provides a strong core that is easily extendable into a rich developer experience via dependency injection modules. While the framework is opinionated by design, this modular system aims to be unobtrusive and to allow developers to create abstraction layers over any codebase or third-party modules.
PhotoQt
PhotoQt is a free and open-source, simple yet powerful image viewer, based on Qt/QML. It mprovides provides a simple and uncluttered interface filled powerful features. PhotoQt supports GraphicsMagick, Libraw, FreeImage, DevIL, Poppler, libarchive.
pump.io
Pump.io is a general-purpose activity streams engine that can be used as a federated social networking protocol. With Pump.io almost anything can be represented with activity streams including short or long text, bookmarks, images, video, audio, events, geo checkins. You can follow friends, create lists of people, and much more.
Blokada
Blokada is a popular, free and open source ad blocker and privacy app for Android and iOS. With Blokada you can efficiently block ads, trackers, malware, save on your data plan, speed up your mobile device. Blokada is actively developed by an amazing open source community where anyone is free to contribute and verify the source code.
Steemit
Steemit is a blockchain-based blogging platform and social media application that rewards its users with the cryptocurrency STEEM for publishing and curating content. On Steemit you can publish blog posts on any topic and get rewarded by doing so. You can also be rewarded by upvoting and curating post that the other users deems noteworthy.
Plurk
Plurk is a micro-blogging social network that allow you to share short messages, links, videos and everything else with your friends. Much like Twitter, Plurk is capped out at 360 text characters per post. Each user of Plurk get's a profile page and a timeline, which lists all the updates received in chronological order, and delivered to other users who have chosen to receive them follow the creator.