Approx. 756 words Open Source Software of the Month

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Open Source Software of the Month

By Geof Goodrum, Potomac Area Technology and Computer Society

April 2017 Issue, PATACS Posts

linux (at)

Beneath the Ice – v1.0. Free Open Source Python executable source code for Microsoft® Windows®, Apple® macOS™, FreeBSD and GNU/Linux® by Team Chimera. Team Winner of the Pyweek 22 challenge, Beneath the Ice is a submarine exploration game and puzzle solving adventure. Uncover a mysterious pariah who can’t let you discover his secrets, who can’t let you in!

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darktable – v2.2.3. Free GNU General Public License source code and executable for Apple® macOS™, FreeBSD and GNU/Linux® by The darktable Team. darktable is a photography workflow application and raw image developer with a virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them. Features include:

  • Fully non-destructive editing.

  • All darktable core functions operate on 4x32-bit floating point pixel buffers, enabling SSE instructions for speedups. It offers GPU acceleration via OpenCL (runtime detection and enabling) and has built-in ICC profile support: sRGB, Adobe RGB, XYZ and linear RGB.
  • A collect module allows you to execute flexible database queries, search your images by tags, image rating (stars), color labels and many more. Filtering and sorting your collections within the base query or simple tagging by related tags are useful tools in your every-day photo workflow.

  • Import a variety of standard, raw and high dynamic range image formats (e.g. jpg, cr2, hdr, pfm, .. ).

  • darktable has a zero-latency fullscreen, zoomable user interface through multi-level software caches.

  • Tethered shooting.

  • darktable currently comes with 21 translations: Albanian, Catalan, Czech, Danish, Dutch, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Polish, Portuguese (Brazilian and Portuguese), Russian, Slovak, Slovenian, Spanish, Swedish, Ukrainian.

  • The powerful export system supports Picasa webalbum, flickr upload, disk storage, 1:1 copy, email attachments and can generate a simple html-based web gallery. darktable allows you to export to low dynamic range (JPEG, PNG, TIFF), 16-bit (PPM, TIFF), or linear high dynamic range (PFM, EXR) images.

  • darktable uses both XMP sidecar files as well as its fast database for saving metadata and processing settings. All Exif data is read and written using libexiv2.

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Free Pascal – v3.0.2. Free GNU General Public License source code and executables for Microsoft® Windows®, Apple® macOS™, FreeBSD and GNU/Linux® by the Free Pascal Team. Free Pascal is a 32, 64 and 16 bit professional compiler for the Pascal programming language. It can target many processor architectures: Intel x86 (including 8086), AMD64/x86-64, PowerPC, PowerPC64, SPARC, ARM, AArch64, MIPS and the JVM. Supported operating systems include Linux, FreeBSD, Haiku, Mac OS X/iOS/iPhoneSimulator/Darwin, DOS (16 and 32 bit), Win32, Win64, WinCE, OS/2, MorphOS, Nintendo GBA, Nintendo DS, Nintendo Wii, Android, AIX and AROS. Additionally, support for the Motorola 68k architecture is available in the development versions.

The language syntax has excellent compatibility with Turbo Pascal 7.0 as well as with most versions of Delphi (classes, rtti, exceptions, ansistrings, widestrings, interfaces). A Mac Pascal mode, largely compatible with Think Pascal and MetroWerks Pascal, is also available. Furthermore, Free Pascal supports function overloading, operator overloading, global properties and several other extra features.
Trelby – v2.2. Free GNU General Public License source code and executables for Microsoft® Windows® and GNU/Linux® by Osku Salerma and Anil Gulecha. Trelby is a simple, fast and elegantly laid out program to make screenwriting simple. It is infinitely configurable. Features include:

  • Screenplay editor: Enforces correct script format and pagination, auto-completion, and spell checking.

  • Multiplatform: Behaves identically on all platforms, generating the exact same output.

  • Choice of view: Multiple views, including draft view, WYSIWYG mode, and fullscreen to suit your writing style.

  • Name database: Character name database containing over 200,000 names from various countries.

  • Reporting: Scene/location/character/dialogue reports.

  • Compare: Ability to compare scripts, so you know what changed between versions.

  • Import: Screenplay formatted text, Final Draft XML (.fdx), Celtx (.celtx), Fountain (.fountain), Adobe Story (.astx) and Fade In Pro (.fadein).
  • Export: PDF, formatted text, HTML, RTF, Final Draft XML (.fdx) and Fountain (.fountain).

  • PDF: Built-in, highly configurable PDF generator. Supports embedding your chosen font. Also supports generating PDFs with custom watermarks, to help track shared files.

  • Free software: Licensed under the GPL, Trelby welcomes developers and screenwriters to contribute in making it more useful.

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