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Best Free and Open Source Software, and many more
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ISO Image Writer - write ISO images to USB drives
ISO Image Writer is a graphical utility from KDE for writing ISO images to USB flash drives. It provides a straightforward interface for selecting an image and target removable device without requiring command-line tools such as dd.
The application can verify supported ISO images using checksums and digital signatures before writing them. It includes safeguards intended to reduce the risk of accidentally overwriting system drives and uses UDisks2 for device access on Linux.
This is free and open source software.
SunPy - Python tools for solar physics data analysis
The package offers a common interface across data from many solar instruments and observatories. Its Fido system searches and downloads observations from multiple services using criteria such as time, instrument and wavelength. Supported sources include the Virtual Solar Observatory, JSOC, CDAWeb, HEK, SOLARNET and several mission-specific archives.
SunPy also provides metadata-aware containers for two-dimensional observations and time-dependent measurements. Map objects combine image arrays with FITS metadata and support coordinate-aware operations, while TimeSeries handles observational data sharing a common time axis.
This is free and open source software.
Knot Resolver – scalable caching DNS resolver
Its core architecture combines C and LuaJIT and exposes a state-machine-like API that can be extended with modules. A Python management component provides a higher-level interface for configuring and operating the resolver.
Knot Resolver takes a shared-nothing approach to scaling. Independent workers can be assigned to available CPU cores and added or removed without interrupting service, while its MVCC cache can be shared where appropriate. This makes the software suitable for both compact installations and systems handling substantial DNS traffic.
This is free and open source software.
reeve – local web development stack manager
Rather than bundling its own copies of these components, reeve manages software already installed on the host. On Linux, services are run through per-user systemd units.
One of its main design goals is letting different local sites use different PHP installations simultaneously. This avoids the usual constraint of switching a single globally active PHP installation whenever a project requires a different environment.
This is free and open source software.
FramR - Wayland screenshot and screen-recording utility
FramR is a Wayland screenshot and screen-recording utility with built-in annotation and upload facilities.
It can capture an entire screen, a monitor or a selected region, edit a screenshot before saving it, copy captures to the clipboard, and record video with configurable encoding. It also supports ShareX and iShare-compatible uploaders for sending captures directly to configured hosting services.
This is free and open source software.
Inetutils - traditional networking utilities and servers
Inetutils is a collection of traditional networking clients, servers and administrative utilities.
It brings together familiar programs for testing connectivity, inspecting network configuration, transferring files, querying remote services and providing classic network daemons. The individual utilities were originally derived from the 4.4BSD-Lite2 distribution, although a number have since been substantially rewritten.
This is free and open source software.
WeaveDreamer - fabric design software for hand weavers
WeaveDreamer is fabric design software for hand weavers.
It provides tools for creating and editing textile weaving drafts with support for arbitrary numbers of warp and weft threads, treadles and harnesses. The application combines traditional draft components with palettes, reusable editing operations, WIF interchange and printing facilities.
This is free and open source software.
Best Free and Open Source Alternatives to Citrix NetScaler
NetScaler is an application delivery controller (ADC) platform designed to optimize, secure and control the delivery of applications. Its functionality includes load balancing, traffic management, SSL/TLS offloading, application acceleration and application security.
NetScaler is proprietary software. We recommend the best free and open source alternatives for Linux.
The software featured here offers alternatives to NetScaler’s core ADC and application-delivery functionality. None individually duplicates NetScaler’s entire integrated stack, which also encompasses areas such as web application firewalling, API security and bot management.
pychemqt – chemical engineering process simulator
pychemqt is a graphical application for calculations and the design of unit operations in chemical engineering. Its scope extends considerably beyond a collection of isolated engineering calculators: users can define process streams, construct flow diagrams and model equipment while drawing on an extensive collection of thermodynamic and physical-property methods.
The software is written in Python with a Qt interface. NumPy, SciPy and Matplotlib provide much of its numerical and plotting foundation, while additional scientific libraries can extend its property calculations and data interchange capabilities.
This is free and open source software.