Free drawing software for Windows, Mac OS X, and Linux
Dia Diagram Editor is free Open Source drawing software for Windows, Mac OS X and Linux. Dia supports more than 30 different diagram types like flowcharts, network diagrams, database models. More than a thousand readymade objects help to draw professional diagrams. Dia can read and write a number of different raster and vector image formats. Software developers and database specialists can use Dia as a CASE tool to generate code skeletons from their drawings. Dia can be scripted and extended using Python.
gPhoto is a program and library framework that lets users download pictures from their digital cameras. The libgphoto2 library gives you access to hundreds of models of digital cameras on several platforms. GIT repo and Issue tracker lives at https://github.com/gphoto/ these days.
A very high quality package of printer drivers for CUPS on Linux, Macintosh OS X, and other POSIX-compliant operating systems. This project also maintains an enhanced Print plug-in for GIMP 2.x from the same code base.
Synfig is a powerful, industrial-strength vector-based 2D animation software package, designed from the ground-up for producing feature-film quality 2D animation with fewer people and resources.
Vector drawing program for LaTeX using PSTricks
LaTeXDraw is a graphical drawing editor for LaTeX. LaTeXDraw can be used to 1) generate PSTricks code; 2) directly create PDF or PS pictures. LaTeXDraw is developped in Java and thus runs on top of Linux, Windows, and Mac OS X.
Read, write and edit metadata
Perl library and command-line application for reading, writing and editing meta information (EXIF, IPTC, XMP, and more) in a wide variety of file formats (JPEG, TIFF, PNG, PDF, RAW, and more).
Simple and intuitive 2D vector drawing for electronics and not only.
A multiplatform vector drawing program with a complete library of electronic symbols. Schematics and drawings are stored in a very compact text format. There is no netlist concept behind the drawings (so no simulation, and this is a choice) but this allows a great graphical flexibility and ease of use, making FidoCadJ the perfect tool for exchange sketches in forum and newsgroup discussions with a few clicks. Drawings can be exported in several graphic formats, such as pdf. Follow the development live on Twitter: https://twitter.com/davbucci
A free and open source screenshot tool optimized for productivity
Greenshot is a lightweight screenshot software tool for Windows that quickly creates screenshots of a selected region, window, or full screen; you can even capture complete (scrolling) web pages from Internet Explorer. Greenshot easily annotates, highlights, or obfuscates parts of the screenshot. Greenshot also exports screenshots in various ways: save to file, send to printer, copy to clipboard, attach to e-mail, send Microsoft Office programs, or upload to photo sites like Flickr or Picasa. And Greenshot has a lot more options, to simplify the creation of, and work with, screenshots every day. Overall, Greenshot is easy to understand and configurable, that's why it is an efficient tool for project managers, software developers, technical writers, testers, and anyone else creating screenshots.
mtPaint is a painting program designed for creating icons and pixel-based artwork. It can edit indexed palette or 24 bit RGB images and offers painting, palette, and image manipulation tools.
a screenshot and annotation tool
HotShots is an application for capturing screens and saving them in a variety of image formats as well as adding annotations and graphical data (arrows, lines, texts, ...).
Superseded by the official Gimp release: http://www.gimp.org/downloads
A self contained application bundle of the GNU Image Manipulation Program for Mac OS X. The Gimp project now releases official Mac OSX builds at http://www.gimp.org/downloads/