Free dwg viewer software for linux

Image Viewer is an image viewer with real-time interactive pan and zoom viewing that uses the GTK+ toolkit and Imlib (or Imlib2).
Image Viewer can open and save to any image format supported by Imlib, rectangular crop, grab the screen, print, and display on the root window.
Main features:
- View
- Convert
- Grab (Screenshot)
- Print
- Rotate
- Crop
- Resize
- Display on Desktop
Enhancements:
- A bug was fixed in the saving of animated GIF images in which looping was not an option.
- The disposal method support for GIF images was improved.

Gerber Viewer in short gerbv is a viewer for Gerber files. Gerber files are generated from PCB CAD system and sent to PCB manufacturers as basis for the manufacturing process. The standard supported by gerbv is RS-274X.

The basic difference between RS-274D (the old standard) and RS-274X is basically the addition of apertures in RS-274X. It might be possible to make an RS-274X file out of an RS-274D file and an aperture list.

gerbv also supports drill files. The format supported are known under names as NC-drill or Excellon. The format is a bit undefined and different EDA-vendors implement it different. But basically you need to have the tools definition in the file, then the parser is quite tolerant. The different holes are shown as dots in the (scaled) correct size.

The different layers of the PCB are separated into different files. gerbv can load all files at the same time and display them "on top of each other". You can independently turn them on and off.

tc-viewer provides the ability to watch current transfers that take place in HTB and HFSC traffic shaping classes on specified interface.

tc-viewer reads output from: tc -s class show dev iface, and analyzes (for each class) values in lines like this one :

Sent 6173259431 bytes 6300224 pkt...

Measured speeds may little vary from the real ones.

Mesh Viewer is an easy to use lightweight application to display triangular meshes from a variety of file formats (see 3D formats).
Mesh Viewer uses the OpenGL API to render the models. The program was born under the need for quickly displaying reconstructed triangulated meshes. The Mesh Viewer based on an idea and an early elementary implementation from Craig Robertson.
The current version was developed by Helmut Cantzler. Triangular meshes can be displayed texture mapped (optional with bilinear filtering), solid or as a skeleton (full or just the front lines).
The surface normals of the triangles can be displayed optionally. Features (from a different data file) like edges and points can be displayed into the mesh. Loaded models can be rotated, translated and scaled (all done with the mouse). The model is lighted by multiple light sources.
Viewpoints can be saved. Screenshots of the model can be taken (as BMP, JPEG, PNG and so on). The program is able to calculate the texture map for the 3D model (experimental!).
It can read:
- PMesh files (used at the Vision group of the University of Edinburgh)
- GTS files (from the Gnu Triangulation Library)
- Geomview files (only format "OFF")
- PLY files (only ASCII format)
- VRML 1 files (no texture mapping)
- VRML 2 files
- Feature file
- List file
File format descriptions:
The PMesh format begins optional with a header. The first header line consists of "#pmesh". The header ends with the first line not starting with a "#". The data starts with nv lines of the format "v float float float" for the vertices. Follows nf lines of the format "p 3 int int int" for the triangles. Each line contains the three indices of the vertices. The index of the vertices starts at one.
The GTS format is describe shortly. The first line contains three unsigned integers separated by spaces. The first integer is the number of vertices, nv, the second is the number of edges, ne and the third is the number of faces, nf. Follows nv lines containing the x, y and z coordinates of the vertices. Follows ne lines containing the two indices (starting from one) of the vertices of each edge. Follows nf lines containing the three ordered indices (also starting from one) of the edges of each face.
The Geomview formal starts with a header consisting of the format line "OFF" and a second line with three integer numbers. The first integer is the number of vertices, nv, the second is the number of polygons, np, and the third number is typically "0". Following are the nv lines of vertices (each consists of three floats). The other part of the file are np lines of polygons. The first number of each line stands for the size of the polygon. Mesh Viewer just reads polygons consisting of 2 or 3 vertices. Following are a number of indices of the vertices depending on the size of the polygon. The index of the vertices starts at zero.
VRML is only supported partly. The Mesh Viewer extracts only vertices and triangles from VRML files and ignores all other shapes. Shapes in VRML 2.0 are rotated, scaled and translated if necessary. The file name for JPEG texture and texture coordinates are read from VRML 2.0 files if existent.
The Feature file is used to store vertices and edges. A feature file can be loaded beside the mesh to display vertices or edges into the mesh. The first header line consists of "#list". The header ends with the first line not starting with a "#". The lines consists of either vertices or edges. A vertex line consists of the format "fv float float float". A edge line starts with "fe" followed by the x, y and z coordinates for the start and the end vertex.
The List file is only a text file listing n mesh files, which a loaded subsequently as different shapes into one mesh. Lists are useful for displaying a segmentation of a mesh. The first header line consists of "#list". The header ends with the first line not starting with a "#". The following n lines consists of the names for the mesh files (one per line).

WP Clipart now includes a viewer to expediate the use of the clipart collection. While it is true that any editor will allow you to "browse" your system for images to open or insert, the interface can often be slow, or you have to dig through the system to find the clipart, and often the display of the images (in thumbnail form) is very small.

The Clipart Viewer (CAV) is quick, has a nice size display (up to 240x240 pixels) and the images are displayed, when resized, in their original proportions. In other words, you get a real good look at the images before you pick one. CAV then lets you copy the image in original size to the clipboard to paste into your program. The preview quality and speed are the biggest advantages to using CAV, but there are a couple other advantages that are not immediately obvious.

First, you paste the saved image while keeping CAV open. This allows you to change your mind to try a different clip or copy and paste another image quickly. You dont have to block your editor with another "open" or "insert" dialog to keep going. You can also paste it into a graphics editor if you want to do a little tweaking and not have to find it again.

On Linux, you often cannot get images into the clipboard to use in apps like AbiWord or the Gimp. Simply by keeping CAV open, Abi and Gimp can be pasted into.

I programmed CAV with Python/wxPython/wxGTK. Dependencies should not be a problem on any system as I have created "stand-alone" executables for both Linux and Windows, using cxFreeze and py2exe, respectively, and included these in the downloads for WP Clipart. [They are in the "Viewer" folder.]

Below are a few screenshots. The use of the little app is fairly self-explanatory . . . by clicking on the "caviewer" in the wpclipart/viewer directory (or more easily, by making a symlink or shortcut to that file) CAV will open with its search tree open to the clipart directory.

vt52vnc is a VNC viewer which can be used on prehistoric green monochromatic terminals called vdt52s, which are capable of vectorgraphics. vt52vnc is a VNC ( http://www.uk.research.att.com/vnc ) viewer, which can be used on old, green, monochromatic, prehistoric terminals labeled vdt52s, which are capable of vector graphics.The software is functional, but incomplete for now: it does not support compression, passwords and there are many ways to optimize the output.


Mouse:
As vdt52s does not have the mouse or any other pointing device, one of three unlabeled buttons near the numeric keypad have been used to act as mouse-lock. When you depress it, you can use the numeric keypad to move the mouse, and `+, `-, `., `enter, `0, and `5 as button 1,2,3 toggle and button 1,2,3 click.

Speed:
Based on my own experiences, I recommend the speeds 38400 and higher for "real work". The screen is drawn by rectangles. This is done to improve the reaction times, when the screen changes very often.

The software uses the XOR mode to actually draw the image, which can be improved using AND and OR mode in some cases. One can also imagine another optimizations for particular shapes. I will not add those optimizations, as the decisions are very memory-consumptive and after all, I dont want to implement some kind of prolog just to
choose the right one. If you want to improve it, let me know.

Colors:
The monochromatic translation is done by some bit of green color, which can be changed at the beginning of vncproto.c. If you want to make it better (implement some dithering or (better) the shape finding algorithm), let me know.

Why and how:
The work was inspired by mine never-ending desire for an X display on the "frog". Display drawings are based on the graphics library by Marek Zelem, which is, in turn, based on the documentation for vdt52s, as my work is based on vnc protocol documentation. Coded, of course, on vdt52s terminal with wrong Enter and Control. The sources are written to be easily extended.

Installation & running
1) edit Makefile to adjust some parameters,
vi Makefile
2) run `make
make
3) optionally install:
cp vt52vnc /usr/local/bin

php syslog viewer is a free web application written in PHP for viewing and searching system logs stored in a MySQL database.
Good system administrators review the logs from each system they administer. As the number of systems gets bigger, this becomes a more complex and time consuming task. Eventually the system administrator would like a way to combine the log messages from all of the systems into one central location, but that is not enough. Without a good search facility, finding the information the system administrator needs is like finding a needle in a haystack.
This is where php syslog viewer comes to the rescue. Using a few common Free Software tools (syslog-ng, stunnel, MySQL, apache, and php), php syslog viewer provides a total solution for centralized logging and log management. Client systems send their log files to a server which stores them in a database. php syslog viewer provides the system administrator with a view into that database. php syslog viewer also includes a tool for optimizing searches and archiving older data so that it takes up less room on the disk.
php syslog viewer is Free Software licensed under the GNU GPL (version 2 or later) as published by the Free Software Foundation.
Main features:
- Log Searching
- Real Time Log Viewer
- Automatic Log Rotation
- User Authentication Possibilities
- LDAP
- Active Directory
- Built-in Authentication
- 3rd Party Client API (outputs XML)
- OSI Certified Open Source Software
- Log Archiving