giflib is a library for rendering and generating GIF image files. This is the GIF service code in C used for over two decades by graphics applications, Web browsers, game consoles, ATMs, and pretty much anything else that throws pixels on a display. It is simple, stable, and bulletproof.
Calligra is an integrated suite of applications that cover office, creative, and management needs. It offers applications on both desktop computers and mobile platforms like tablets and smartphones. OpenDocument Format (ODF) is used, making it compatible with OpenOffice.org, LibreOffice, and Microsoft Office. Calligra Suite contains the following applications: Calligra Words (word processor), Sheets (spreadsheets), Stage (presentations), Flow (diagrams and flowcharts), Kexi (visual database creator), Braindump (note taking), Plan (project management), Krita (drawing), and Karbon (vector graphics).
Piwigo is photo gallery system for the Web. The project started in 2002 and is built by an active community of users and developers. It comes with powerful features for publishing and managing your photos, scalability, and smart browsing capabilities such as albums, tags, or calendars. Extensions make Piwigo even more customizable.
Asciidia generates bitmap or vector files from simple ASCII diagrams. It was inspired by ditaa but has a plugin based architecture, which allows it to draw specialized diagrams. Currently-supported diagram types are simple ASCII diagrams and directory trees. Asciidia can directly output SVG and MVG. For additional file formats, an ImageMagick installation is required.
JUDO is a Java IDE for children and beginning programmers. It is very easy to use and has a very simple interface. It was designed to be used as a teaching aid for teaching programming classes to children. The programs you create with JUDO can be graphical, text input/output, or both. All you need to do to write a JUDO program is write a simple void main() function.
graphviz is a set of graph drawing tools and libraries. It supports hierarchical and mass-spring drawings; although the tools are scalable, their emphasis is on making very good drawings of reasonably-sized graphs. Package components include batch layout filters and interactive editors for X11, Java, and a TCL/tk extension. The batch filters can be configured as a web visualization service (using GIF and click-maps). Typical applications include display of finite state machines, software diagrams, database schemas, and communication networks.
pngcrush is an excellent batch-mode compression utility for PNG images. Depending on the application that created the original PNGs, it can improve the file size anywhere from a few percent to 40% or more (completely losslessly). The utility also allows specified PNG chunks (e.g. text comments) to be inserted or deleted, and it can fix incorrect gamma info written by Photoshop 5.0 as well as the erroneous iCCP chunk written by Photoshop 5.5.
Orfeo Toolbox (OTB) is a high resolution remote sensing image processing library. It contains a set of algorithmic components which allow the user to capitalize on methodological know how, and therefore use an incremental approach to profit from the results of methodological research. OTB is made of a set of basic elements (a C++ class API) and utilities (independent programs built upon the base API).