rasterview
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RasterView is a CUPS, PWG, and Apple raster file viewing application.

It basically allows you to visually evaluate raster data produced by any of the standard CUPS RIP filters (cgpdftoraster, imagetoraster, pdftoraster and pstoraster). It is normally used to either test those filters or look at the data that is being sent to your raster printer driver.

RasterView is provided as free software under version 2 of the GNU General Public license.

Authors: KurtPfeifle

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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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mki3dgame
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A simple OpenGL game of searching for tokens in 3D stages. You also have to avoid the monsters. (They can capture you.)

Any user can prepare his own assets with stages, monsters and tokens designned with MKI3D (https://mki1967.github.io/mki3d/) as explained in https://github.com/mki1967/mki3dgame/blob/master/README.md

Authors: mki1967

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htmldoc
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HTMLDOC is a program that reads HTML and Markdown source files or web pages and converts these into corresponding EPUB, HTML, PostScript, or PDF files with optional tables of contents.

HTMLDOC was developed in the 1990's as a documentation generator for my previous company, and has since seen a lot of usage as a report generator embedded in web servers. However, it does not support many things in "the modern web", such as Cascading Style Sheets (CSS), PDF Encryption (other than 128-bit RC4), PDF forms, complex HTML tables (other than HTML-3.2), Unicode with right-to-left text formatting, Emoji.

HTMLDOC can run from the command line (CLI) as well as with a graphical user interface (GUI). It also supports operation as a CGI program for a web server to provide PDF-formatted output from a web page. The GUI starts automatically if you run HTMLDOC without any options. Since support for Markdown input and EPUB output is still under development, both options are not available from the GUI, but only from the CLI.

Authors: KurtPfeifle

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VLC

VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols.

Authors: darealshinji

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Textilosaurus

Textilosaurus is simple cross-platform text editor based on Qt and QScintilla. Textilosaurus aims to provide similar workflow as Notepad++ does.

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Stellarium
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Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets and nebulae, and has many other features including multiple panoramic landscapes, fog, light pollution simulation and a built-in scripting engine.

Stellarium comes with a star catalogue of about 600 thousand stars and it is possible to download extra catalogues with up to 210 million stars.

Stellarium has multiple sky cultures - see the constellations from the traditions of Polynesian, Inuit, Navajo, Korean, Lakota, Egyptian and Chinese astronomers, as well as the traditional Western constellations.

It is also possible to visit other planets in the solar system - see what the sky looked like to the Apollo astronauts, or what the rings of Saturn looks like from Titan.

Authors: Stellarium

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Scribus
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Scribus is a open source page layout program which produces commercial grade output in PDF and Postscript, primarily, though not exclusively, for Linux.

While the goals of the program are ease of use and simple easy-to-understand tools, Scribus support for professional publishing features, such as CMYK and spot colors, easy PDF creation, Encapsulated Postscript import and export and creation of color separations.

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Quentier
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Quentier is a cross-platform note taking app capable of working as Evernote client. It can also be used for local note taking as well, without the necessity to even have the Evernote account. Quentier supports the following features: * Synchronization of user data (notebooks, notes, tags, saved searches) with Evernote servers * Evernote search syntax can be used for data searching within the local database * Printing of notes and converting them to pdf files * Ability to open several notes simultaneously in either tabbed or windowed interface * Ability to switch between accounts - both local and Evernote ones

Authors: d1vanov

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QmidiNet
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QmidiNet is a MIDI network gateway application that sends and receives MIDI data (ALSA Sequencer and/or JACK MIDI) over the network, using UDP/IP multicast. Inspired by multimidicast (http://llg.cubic.org/tools) and designed to be compatible with ipMIDI for Windows (http://nerds.de).

Authors: rncbc

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QmidiCtl
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QmidiCtl is a MIDI remote controller application that sends MIDI data over the network, using UDP/IP multicast. Inspired by multimidicast (http://llg.cubic.org/tools) and designed to be compatible with ipMIDI for Windows (http://nerds.de).

Authors: rncbc

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Peruse
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Okular is a universal document viewer developed by KDE. Okular works on multiple platforms, including but not limited to Linux, Windows, Mac OS X, *BSD, etc.

Features:

  • Supported Formats: PDF, PS, Tiff, CHM, DjVu, Images, DVI, XPS, ODT, Fiction Book, Comic Book, Plucker, EPub, Fax
  • Sidebar with contents, thumbnails, reviews and bookmarks
  • Annotations support

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LibreOfficeStill
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The office productivity suite compatible to the open and standardized ODF document format. Supported by The Document Foundation.

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LibreOfficeFresh
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The office productivity suite compatible to the open and standardized ODF document format. Supported by The Document Foundation.

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LibreOfficeDev
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The office productivity suite compatible to the open and standardized ODF document format. Supported by The Document Foundation.

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Kdenlive
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Kdenlive is a non linear video editor. It is based on the MLT framework and accepts many audio and video formats, allows you to add effects, transitions and render into the format of your choice.

Features:

  • Intuitive multitrack interface.
  • Many effects and transitions.
  • Color scopes
  • Basic DVD Wizard

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CozyDrive
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Save them safely in your open source personal cloud, access them anywhere, anytime with the mobile application and share them with the world or just your friends and colleagues. You can host your own Cozy Cloud, and or use the hosting services. Your freedom to chose is why you can trust us.

Authors: cozy-labs

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