Free simple but effective software for linux

Simple Meeting Website project is a simple TurboGears Web site that can track RSVPs for a series of meetings.
Enhancements:
- Emailed meeting reminders have been added (activated by a cron job).
- The site now validates as HTML 4.01 Strict.

Simple Equation makes it simple to put equations on the Web. Simple Equation project does not bother the user with the layout of the equation; it just displays it. The focus is on being simple to use.

One of the biggest obstacles to using mathematical expressions on the web is that the user currently needs to worry about layout. Web users should not have to learn a layout engine.

The class is built as a recursive parser. It is pretty easy to add operations to the parser, but it will not scale to a huge set of operations. That is OK, we want to keep things simple. At some point a layout engine may be required for a complexity level. This is not a layout engine.

Currently, only graphical output is generated, but it is hoped that MathML output can be generated automatically if the browser supports it instead of the graphic.

Simple Blue is a modified Sunergos Blue theme with user list.

Lightweight (SVG), elegant, works with all languages and widescreen.

simple instant messaging (sim) is an IRC client specialized for use with bitlbee. It is based on sic (http://suckless.org). It reads commands from standard input and prints all server output to standard output.
simple instant messaging also multiplexes all channel traffic into one output, so you dont have to switch to different channel buffers. sim must be customized by editing its source code to insert the correct username, server, password, and identification information.
Enhancements:
- The command operator was changed.
- Some code simplifications were done.
- The output format was adjusted.

Simple terminal screensaver (or tss for short) is an attempt to clone and enhance FreeBSDs daemon saver.
Although intended for GNU/Linux, it works fine under FreeBSD and probably a lot of other Unix-based Operating Systems.
Main features:
- VT Locking (Shadow and BSD DB)
- ASCII Mirroring
- Multiple colors in ASCII
- Scrollbox showing uptime
- Random ASCII file selection
- Dynamic object speeds
Enhancements:
- Failed login attempts are now reported to syslogd.

Simple Invoices is a clean, simple, and basic Web-based invoicing system.

Simple Invoices is meant for personal invoices, home office invoicing, small organization invoicing, and basic POS (point of sale) systems for light usage.

Its goals are to be easy to use, simple and clean, and focused on its task. It is not meant for heavy-use POS applications, nor is it meant to be enterprise ready.

Simple Monitor is a SuperKaramba theme inspired by the simple but effective "Very Simple Monitors" theme by the user humanthing. Some values are not displayed properly though in Very Simple Monitors (network values and IP). This could be because of different setups. My computer is pretty standard so my theme should function properly on most pcs. http://www.kde-look.org/content/show.php?content=48973
I like a tight and clean desktop, so I simplified the idea even more. This theme is showing all basic information, and nothing more.
Main features:
- Processors type
- Processor speed
- Processor load (number and graph, for one proc)
- Processor Temperature
- Amount of ram used / amount of ram
- amount of swap used / amount of swap
- amound of HDD space used / amount of HDD space total (for "/root" and "/home")
- HDD temperatue (for "/hda", I could add another drive if requested)
- Computer name
- Computer ip
- Network load (up- and download, values and graph)
- Amount of transfered data thrue internet (up- and download) since last boot
Enhancements:
- Made the three blocks clickable.
- The CPU block opens Processor information
- The Memory block opens KsysGuard (youll need to have it installed to be able open it, obviously. Its in Kubuntu by default)
- the Network block opens your computers ip settings window
- Added a line for your computers uptime
- Changed font colors to very dark gray and very light gray, instead of black and white, to make it look softer.

SimpleWebShare is a small application for publishing a part of your hard disk on the Web. Simple Web Share project displays files and directories in a list view and allows them to be downloaded, including on-the-fly zipping.
Main features:
- Display file and directory as list
- Download of file
- Download of directory with on-the-fly zip generation (with a customizable folders size limit)
- Simple HTTP Authentification
- Localized interface (currently french or english)