Utilities

Small utility applications, "Accessories"

QOwnNotes

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QOwnNotes is the open source (GPL) plain-text file notepad with markdown support and todo list manager for GNU/Linux, Mac OS X and Windows by Patrizio Bekerle, that (optionally) works together with the notes application of ownCloud or Nextcloud.

Authors: pbek

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Subsurface

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Subsurface is an opensource diving logbook that runs on Linux, Windows and Mac. With this program, users can keep track of their dives by logging dive locations (with GPS coordinates), weights and exposure protection used, divemasters and dive buddies, etc. Subsurface also enables the users to rate their dives and provide additional dive notes.

Dives can be downloaded from a variety of dive computers, inserted manually or imported from other programs. A wide array of diving statistics and information is calculated and displayed, like the user’s SAC rate, partial pressures of O2, N2 and He, calculated deco information, and many more.

The dive profiles (and the tank pressure curves) can be visualized in a comprehensive and clean way, that provides the user with additional information on relative velocity (and momentary air consumption) during the dive. Subsurface also allows the user to print out a detailed log book that includes dive profiles and other relevant information. The program is localized in about 20 languages and well supported by an active developer community.

Authors: Subsurface-divelog

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ksnip

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​ Ksnip is a Qt based Linux screenshot tool that provides many annotation features for your screenshots. ​

Screenshots:

  • X11 and experimental KDE and Gnome Wayland support.
  • Taking Screenshot of a custom rectangular area that can be drawn with mouse cursor (X11 and Gnome Wayland only).
  • Taking screenshot of full screen, including all screens/monitors.
  • Taking screenshot of window that currently has focus (X11 and Gnome Wayland only).
  • Taking screenshot of window under mouse cursor (KDE Wayland only).

Annotation:

  • Drawing on captured screenshot with two different tools, pen (opaque) and maker (semi-transparent).
  • Drawing two shapes ellipse and rectangle, with and without fill.
  • Drawing lines and arrows.
  • Customizable color and size (thickness) for all drawing tools.
  • Writing text on screenshots, with customizable font, size, color etc.
  • Numbering tool with customizable font and color.

Authors: DamirPorobic

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qpdf

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QPDF is a command-line program that does structural, content-preserving transformations on PDF files. It could have been called something like pdf-to-pdf. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.

QPDF is capable of creating linearized (also known as web-optimized) files and encrypted files. It is also capable of converting PDF files with object streams (also known as compressed objects) to files with no compressed objects or to generate object streams from files that don't have them (or even those that already do). QPDF also supports a special mode designed to allow you to edit the content of PDF files in a text editor. For more details, please see the documentation links below.

QPDF includes support for merging and splitting PDFs through the ability to copy objects from one PDF file into another and to manipulate the list of pages in a PDF file. The QPDF library also makes it possible for you to create PDF files from scratch. In this mode, you are responsible for supplying all the contents of the file, while the QPDF library takes care off all the syntactical representation of the objects, creation of cross references tables and, if you use them, object streams, encryption, linearization, and other syntactic details.

QPDF is not a PDF content creation library, a PDF viewer, or a program capable of converting PDF into other formats. In particular, QPDF knows nothing about the semantics of PDF content streams. If you are looking for something that can do that, you should look elsewhere. However, once you have a valid PDF file, QPDF can be used to transform that file in ways perhaps your original PDF creation can't handle. For example, programs generate simple PDF files but can't password-protect them, web-optimize them, or perform other transformations of that type.

Authors: qpdf

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