dispcalGUI is a graphical user interface for the display calibration and profiling tools of Argyll CMS, an open source color management system by Graeme Gill.

Calibrate and characterize your display devices using one of the many supported hardware sensors, with support for multi-display setups and a variety of available settings like customizable whitepoint, luminance, black level, tone response curve as well as the option to create matrix and look-up-table ICC profiles, with optional gamut mapping. Other features include:

Commotion is an open-source communication tool that uses mobile phones, computers, and other wireless devices to create decentralized mesh networks.

With Hugin you can assemble a mosaic of photographs into a complete immersive panorama, stitch any series of overlapping pictures and much more.

A simple but powerful library for building data applications in pure Javascript and HTML.

Navigate a large image collection with a thumbnail browser, click on images to view or edit. Most image formats are accepted. Import camera RAW files and edit with 24-bits per color. Save edited images as PNG, JPG, BMP, or TIF (8 or 16 bits per color). Select an object or area with several methods, apply any edit function, cut and paste, resize, blend, warp, etc. without using layers. Edit functions have live feedback using the full window.

PDFedit is a free open source pdf editor and a library for manipulating PDF documents. It includes PDF manipulating library based on xpdf, GUI, set of command line tools and a pdf editor.

OpenWrt is a Linux based distribution for embedded systems, with a strong integration of network components. OpenWrt is currently being used in industrial mobile and landline phones, control systems, small robots, sensor networks, home control solutions, VoIP systems, both wired and wireless networks and a whole lot more.

B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is a routing protocol for multi-hop ad-hoc mesh networks.

The olsr.org OLSR daemon is an implementation of the Optimized Link State Routing protocol. As such it allows mesh routing for any network equipment.
It runs on any wifi card that supports ad-hoc mode and of course on any ethernet device.
OLSR is next to AODV one of the main two internet standards for mesh networks. It is widely used and well tested.

Audacity is a free, easy-to-use and multilingual audio editor and recorder . You can use Audacity to:

• Record live audio.
• Convert tapes and records into digital recordings or CDs.
• Edit Ogg Vorbis, MP3, WAV or AIFF sound files.
• Cut, copy, splice or mix sounds together.
• Change the speed or pitch of a recording.