ximtool displaying IRAFs dev$pix

ximtool

Interactive image display program for the X Window System

Ximtool provides an image display capability to remote client applications for IRAF using the standard imtool/iis image display protocol. The image display server allows a number of image frame buffers to be created and displayed. The client can read and write data in these frame buffers. Any frame or combination of frames can be displayed. Various display options are provided, e.g., zoom and pan, flip about either axis, frame blink, windowing of the display, and colortable enhancement.
An example of a gallery.

fgallery

static HTML+JavaScript photo album generator

“fgallery” is a static photo gallery generator with no frills that has a stylish, minimalist look. “fgallery” shows your photos, and nothing else.
interpreter of Z-code story-files

frotz

interpreter of Z-code story-files

Frotz interprets Z-code story-files, which are usually text adventure games (although a few arcade-style Z-code games have been written). Examples of such story files include the adventure games published by Infocom, as well as any games produced by compilers to this format, such as Inform. You can find a number of Inform-compiled games up for anonymous FTP at ftp://ftp.ifarchive.org/ or HTTP at http://www.ifarchive.org/
Monitoring Health

icinga2

host and network monitoring system

Icinga 2 is a general-purpose monitoring application to fit the needs of any size of network. Icinga 1.x was a Nagios fork; this new generation has been rewritten from scratch in C++, with multi-threading and cluster support.
least square fit demonstaration

ngraph-gtk

create scientific 2-dimensional graphs

Ngraph is the program to create scientific 2-dimensional graphs for researchers and engineers. This program can create advanced graphs which can't be created by spreadsheets. Graphs can be exported to postscript.
user-space bandwidth shaper

trickle

user-space bandwidth shaper

Trickle is a voluntary, cooperative bandwidth shaper. It works entirely in userland and is very easy to use.