Free zooming software for linux

Cornice is a cross-platform image viewer written in Python + wxPython + PIL. It doesnt pretend to be complete, fast, or even useful, but I like it and it is the viewer I use on both Linux and Windows. It has been inspired by the famous Windows-only ACDSee.
Why did I write it? Well, because I like ACDSee, but its not free and it doesnt run on Linux, which is my main platform. There already exists an ACDsee-like viewer, GTKSee, but it is unmaintained and it lacks some features I wanted (bookmarks, a good keyboard navigation and zooming).
First I tried to add such features to it, but then I decided to rewrite it from scratch, so that I could use it also on windows (and also because I had some troubles, especially when trying to port GTKSee to the gdk_pixbuf lib, and also because Python is more fun than C, and...
Main features:
- Fully cross-platform: it should run wherever wxPython does;
- Detail and thumbnail view for images;
- Image preview;
- Automatic recognition of images, with a variety of formats supported;
- Bookmarks;
- Full-screen view;
- Zooming and rotation;
- Slideshow;
- Good keyboard navigation (still not perfect, but this is true for all the features ;-);
- Image loading from zip archives;
- i18n support (with Italian and French translations available);
- EXIF data support;
- Some more...

Quax is a very small Qt graphical application which can be used to enlarge parts of your X Window desktop. Its mainly targeted at web designers and graphic artists, but its very easy to use by any other user.
Quax home page is located at: http://www.ro.kde.org/quax/. Quax is released under the terms of GNU public license.
Main features:
- very easy to use;
- 4 zoom levels;
- color tooltip with copy to clipboard and color preview;
- moving the zoom window by dragging;
- the ability to change the zoomed direction;
- shortcuts for common operations;
- moving by dragging;
- changing zoomed direction;
- decent documentation.
- support for WIN32 platform
Enhancements:
- spec: updated SuSE and Mandrake spec to include the handbook
- app: corrected URL to new Quax documentation
- spec: updated RedHat spec to include the handbook
- doc: finished Docbook user documentation (Quax manual)
- app: minor labeling changes for menus
- doc: finished Doxygen documentation; started Docbook user doc
- app: now color tooltip will be repositioned when will get out for screen; made some optimizations, removed unused variables and others are local
- spec: support for RedHat 9.0 (script + spec)
- spec: support for Mandrake 9.x (script + spec)
- doc: install instructions for Mandrake 9.x; started to document Quax; more Doxygen setup; updated manual page
- app: removed qDebug()s

yEd is a powerful graph editor that is written entirely in the Java programming language. It can be used to quickly generate drawings and apply automatic layouts to all kinds of diagrams and networks. yEd is available as a free download with unrestricted functionality!
yEd makes use of the yFiles library which is a Java class library for viewing, editing, optimizing, drawing, and animating diagrams, networks, and other graph-like structures.
yEd is built using 100% lightweight Swing components, i.e., it will run on any platform for which there is a suitable Runtime Environment available.
Main features:
yEd can be used to automatically layout complex graph structures. Several highly sophisticated layout algorithms have been implemented and ship with yEd. They can be used to either arrange the items fully automatically or support the user during a manual layout.
- New in version 2.3.1: Interactive Hierarchical Layout can be used to interactively layout hierarchical or pseudo-hierarchical scenarios.
- Hierarchical Layout can be used to perfectly visualize hierarchical or pseudo-hierarchical scenarios.
- Orthogonal Layout produces clear representations of complex networks.
- Organic Layout and Smart Organic Layout produce clear representations of complex diagrams like ER-diagrams, UML diagrams and many more.
- Organic Edge Router reroutes edges in existing drawings organically.
- Orthogonal Edge Router can reroute edges in existing drawings orthogonally.
- Circular Layout portrays interconnected ring and star topologies perfectly.
- Tree Layout can be used to visualize tree-like structures in many different ways.
- New in version 2.3.1: The tree layout algorithms can also be used on graphs that are almost like trees.
yEd enables users to create groups of nodes. These groups can be visualized and nested to virtually any degree. Of course the new layout algorithms support this type of visualization perfectly. Using this feature complex structures can be visualized and laid out even clearer than before.
Another one of yEds most powerful features is its ability to automatically assign label positions. This will help the user to easily build better readable diagrams.
yEd has an intuitive user interface that complies with the design guidelines for Java applications. Among its various features are:
- New in version 2.3.1: a customizable workplace lets you arrange your tool windows to your needs
- New in version 2.3.1: table-like property editors allow you to configure the graphical properties easily
- Internationalization: yEd has been localized in English, German, and partially in Japanese
- New in version 2.3.1: a sophisticated print preview allows you to preview the printing results (especially useful for poster-printing)
- Session Management: yEd remembers and manages your settings
- Undoability support
- Clipboard facility
- Keyboard shortcuts for most of the functions
- Integrated help system
yEd can be used to build, modify, and visualize graph structures. They can be loaded using several different file formats, among them are:
- Full support for the YGF file format. The native file format.
- Full support for the XML-based GraphML file format.
- Full support for the GML graph file format. GML is a popular text-based graph file format.
- New in version 2.3.1: Full support for the XML-based GML graph file format. This is a variant of the GML language that uses XML syntax.
- Import of arbitrary XML files. An XSLT stylesheet must be given that transforms the XML input into a valid GraphML. Predefined stylesheets for Ant build scripts, the OWL Web ontology language and others are included.
- Export to the SVG vector graphics file format.
- Export to the Windows Meta File (WMF) file format. A vector graphics format used in almost any Windows application.
- Export to JPG and GIF file formats. Export large images as multiple images and HTML tables also supported!
- New in version 2.3.1: Export to BMP (on Windows machines) and PNG file formats.
All of the image export formats can be fully customized.
The editor supports the complete set of graphical attributes necessary for effective graph visualization. It offers built-in support for:
- preconfigured node types for UML object diagrams and class diagrams!
- multiple labels for nodes and edges
- multi-line and icon labels
- powerful searching and selection utilities
- zooming and overview
- a set of beautiful icons to get you started with your first diagrams

gvidm is a GTK app to quickly and easily change video resolutions in X.

GVidChanger-minimal (gvidm) is a GTK app to quickly and easily change video resolutions in X. Running it will pop up a list of available modes; upon choosing a mode or cancelling, it exits. If you are running dual or multi-head displays, it will give you a list of screens so you can select the appropriate one.

You can also specify on the command line a mode to switch to immediately, or a list of modes to choose from. It supports both XVidMode(for "zooming") and XRandR (for changing the screen size as well as the resolution.)

Protux (and not ProTux) is a practical and powerfull multitrack digital audio suite for GNU/Linux. It aims to be the most practical and one of the most powerful audio recording and editing tool around.
Protux uses another GUI interaction concept then most other applications. Instead of using buttons and menus, it makes use of the JMB (Jog Mouse Board) engine found in the mustux library.
With this concept, the mouse as a clicking device is almost abolished, but instead its only used as a pointing device. Smart keyboard key usage will perform the action you want to perform on the pointed object. Its very fast and intuative as well, at the moment you get used to it, which is a matter of hours!
This concept helps to make a very clean GUI, fast audio processing, and production!
Main features:
- Totally oriented to keyboard+mouse usage, without mouse clicks (JMB Engine)
- Non destructive editing
- Infinite (theoretically) number of tracks
- ALSA based, with transparent sound card buses mapping
- Project / Song Manager
- Real Time Filters
- Gain/Pan Curves
- Fades in/out, and auto cross-fades in clips
- Beautifull documentation/users guide in Latex/Ps/Pdf format
- Mp3/Ogg Import
- Export in PRAF (native format) or Wav
- Support for any sample rate (minimum 32000) at 16 bits (only for now)
- In/Out Buses Monitoring
- Practical Simultaneous record-and-playback
- Very fast peak (Audio Representation) building and drawing
- The best zooming technique known.
- Precision Tuner (for guitar player, for example)
- Clean (very clean!) interface
- Released under the GPL

ps3 is a utility for monitoring process activity on a Linux machine. It is a little bit like top, except that:
- it displays all processes
- it updates itself up to 100 times per second instead of once every three seconds
- it shows a 3D chart, with interactive rotation, zooming and scaling
Installation:
Just type make.

ShowImg is a feature-rich image viewer which can display numerous formats, including JPEG, PNG, GIF (animated), MNG, PSD, ... ShowImg application consists of a tree view frame, a directory and preview frame, and a view frame.
The (larger) view frame can be exchanged with the (smaller) directory/preview frame. It can preview and display images from multiple directories and search for identical images.
ShowImg also features a full-screen mode, zooming, sorting, dragndrop with Konqueror, support for images in compressed archives (tar, tar.gz, zip, ...) and kipi plugins.
Main features:
Viewer
- display JPEG, PNG (alpha layer supported), GIF, XCF, PSD, etc. files;
- open several directories, and archives (.tar.gz, .tar.bz2, .zip, ...);
- apply filters to displayed image;
- preview, fullscreen, slideshow, ``fit-to-screen, efficient zoom;
- open files with external programs;
- support EXIF header (JPEG file metadata);
- display a hexadecimal view.
Management
- batch rename;
- search for exact and similar images;
- several formats conversion;
- manage photo albums.
Configuration
- kipi plugins supported (see kipi plugin homepage);
- configurable interface.
Enhancements:
- Database added to manage images using KexiDB (http://kexi-project.org/),
- Video support added,
- SVG support added,
- RAR archive file support added.