LDraw™ editor for LEGO® style digital building instructions.
LPub3D is an Open Source WYSIWYG editing application for creating
LEGO® style digital building instructions. LPub3D is developed and
maintained by Trevor SANDY. It uses the LDraw™ parts library, the
most comprehensive library of digital Open Source LEGO® bricks
available (www.ldraw.org/ ) and reads the LDraw LDR and MPD model
file formats. LPub3D is available for free under the GNU Public License v3
and runs on Windows, Linux and macOS Operating Systems.
LPub3D is also...
Sheet music reader, for hands-free musical performing.
E-Part can be used for every musician who wants to get free from the paper era, using some electronic paper device (E-Ink, Digital Paper, etc) or even a tablet as means of reading your parts while performing. The sheet music should be in PDF format, scanned or digitized.
eLectrix is an application to view Portable Document Format (PDF) files. The program is written in the C programming language, using GTK+ for the user interface and poppler for rendering pages.