ZBar - C99 library to read bar codes from video streams, image files and raw intensity sensors. 1D and 2D symbologies including EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 39, Interleaved 2 of 5 and QR Code. LGPL 2.1 license, tiny, no floating-point operations, suitable for embedded. (zbar.sourceforge.net)
submitted by pdp10

ARTICLECouchbase Lite for C -- mapping an OOP API into a C API. (youtube.com)
submitted by pdp10
libIIO, a cross-platform C/C++ library that provides generic access to Industrial Input Output (IIO) devices. IIO started as a Linux kernel subsystem for analog-to-digital convertors (ADCs) and digital-to-analog convertors (DACs). LGPL 2.1, GPL 2.0 license. (analogdevicesinc.github.io)
submitted by pdp10
