gThumb - GTK image viewer and image organizer with simple editing functions.
GUI System Information
hardinfo
Internet and Networking
Angry IP Scanner
Fragments torrent client
SftpMan GTK - GTK frontend for SftpMan (application that handles sshfs/sftp file systems mounting).
Not in Ubuntu repos.
Sirikali provides a Qt/C++ GUI front end to cryfs, gocryptfs, securefs, sshfs, and encfs, allowing the user to create, mount, and unmount encrypted volumes.
A small and simple sound and music player that is well integrated with GNOME.
Amberol aspires to be as small, unintrusive, and simple as possible.
It does not manage your music collection; it does not let you manage playlists, smart or otherwise; it does not let you edit the metadata for your songs; it does not show you lyrics for your songs, or the Wikipedia page for your bands.
Flashy-looking Flutter app designed exclusively for the Ubuntu desktop.
Tube Converter:
Get video and audio from the web.
The recommended way to get the app is to install Tube Converter from Flathub.
SoX
Swiss army knife of sound processing
Can be used to generate white noise, pink noise, etc.
MAFA
MPD client app for android
OCR
Graphical GTK+ front-end to tesseract-ocr
Operating Systems
Atlas is a Windows version designed for gamers. Atlas users can enjoy higher framerate, lowered input delay & latency. Great for people on a low-end system, or high-end gaming machine.
Murena is an umbrella name for the /e/OS operating system, associated open source powered smartphones, and cloud-based services. The Murena project provides open source images for common smartphones, open source cloud-based storage, calendar, and backup solutions, and sells phones with /e/OS pre-installed. The project's operating system is based on LineageOS, itself based on Android. The Murena team removes closed source applications, trackers, and Google-specific elements of Android and replaces them with open source alternatives.
Chimera Linux is based on the Linux kernel but it bills itself as non-GNU/Linux becuase it uses FreeBSD userland tools, LLVM compiler and toolchain, and musl C library.
tiny11, according to its web site, "has everything you need for a comfortable computing experience without the bloat and clutter of a standard Windows installation."
ChromeOS Flex is a distribution of ChromeOS that can be installed on conventional PC hardware.
Nala is a front-end for libapt-pkg. Specifically we interface using the python-apt api.
sudo nala fetch This command works similar to how most people use netselect and netselect-apt.
nala fetch will check if your distro is either Debian or Ubuntu.
Nala will then go get all the mirrors from the respective master list.
Once done we test the latency and score each mirror.
Nala will choose the fastest 3 mirrors (configurable) and write them to a file.
Pacstall
Pacstall is the AUR Ubuntu wishes it had. It takes the concept of AUR and puts a spin on it, making it easier to install programs without scouring github repos and the likes.
Password Managers
Bitwarden Unified is a self-hosted instance of a Bitwarden vault (Docker image) currently in beta. Can be run on Raspberry Pi.
PDF
Xournal++
Primarily, Xournal++ is a tool for handwritten notes.
But Xournal++ provides a PDF annotation tool, which can be used for basic PDF editing like highlighting, adding text, drawing figures, etc.
PDFsam
PDFsam (basic edition) is a free and open-source tool that lets you easily split, merge, rotate, and extract PDF files.
Nice GUI.
Xournal
Note-taking program supporting pen & PDF annotation