Free lightweight solution software for linux

Lightweight C++ is a programming language that looks like C++ (a lightweight C++ dialect) and is directly translated to readable C by the lwc preprocessor.
Its more "K&R" and, well, more lightweight. Important thing about lightweight C++ is that by studying the generated C code it is easy to understand how OOP features are implemented and what is the cost of everything.
Adding new features and extensions is also very easy (much easier than adding new C++ extensions to gcc at least), and this is one of lwc goals: To keep evolving.
Main features:
- function overloading,
- member functions,
- inheritance,
- virtual functions (polymorphism),
- multiple inheritance,
- virtual inheritance and pure virtual functions,
- constructors, destructors,
- new and delete,
- default function arguments,
- simple exceptions (no auto destruction of locals)
- and a mechanism of simplistic templates (implemented as high-level multi-line macros).
- operator overloading (works with ptrs when it can)
- +other
Enhancements:
- Changed the generated code for the gcc cleanup attribute so that if a constructor throws, the destructor is not invoked. As in the simple case where we dont have the cleanup attribute and like C++.

LightWeight Time Tracker (LWTT) is a very simple time-tracking program. LightWeight Time Tracker provides independent real-time tracking of multiple tasks (such as programming, lectures, presentations, etc.).

The data are saved to an XML file under the home directory.

Postfix SMTP Monitoring Solution is a set of three Perl CGI scripts used to monitor the SMTP queue, allowing the deletion of messages that for one reason or another become "stuck" in the queue.

I needed a web-based solution to monitor my Postfix SMTP relay, which enabled me to remove messages that become "stuck" in the queue. I wrote three simple Perl scripts, and used Sudo to give me the desired functionality.

I am uploading these scripts in case they are useful to others. Assuming you have Apache configured correctly on your Postfix server, it should be as easy as placing the three .cgi files into your webservers cgi-bin directory, and making the appropriate modifications to your /etc/sudoers file (see the README contained in the tarball).

Yet Another V4L Application (or yava for short) is lightweight v4l framegrabber with support for TrueType fonts and ftp-upload.
Yet Another V4L Application project is written in ANSI C.
It uses Andreas Schifflers excellent SDL_bgrab library for frame grabbing, SDL for internal image manipulation, SDL_ttf for TrueType font rendering, libcurl for ftp uploads and libpng for snapshot writing.
Main features:
- Lightweight, using pretty standard libraries
- Tuner support
- FTP-upload (active and passive modes)
- TrueType font rendering
- Text color (RGB) selection
- Vertical text positioning (top, center, bottom)
- Horisontal text positioning (left, center, right)
- Font selection and number of pts
- Snapshots in png
- Live viewer or console mode

SVN-RaWeb-Light is a Perl module, that once installed and driven by a CGI script provides a lightweight Web-based browser for remote Subversion repositories, not unlike the default HTML one for http:// repositories. (with some improvements).

If you deploy this module in a public URL with a good bandwidth, let me know so I can link to it here for demonstration purposes.

MiniUPnP Client and Daemon is an UPnP IGD client lightweight library and UPnP IGD daemon.
The UPnP protocol is supported by most home adsl/cable routers and Windows 2K/XP. The aim of the MiniUpnp project is to bring a free software solution to support the "Internet Gateway Device" part of the protocol.
The Linux SDK for UPnP devices (libupnp) seems too heavy for me. I want the simplest library possible, with the smallest footprint and no dependencies to other libraries such as XML parsers or HTTP implementations. All the code is pure ANSI C.
Compiled on a x86 PC, the miniupnp client library have less than 15KB code size. For instance, the upnpc sample program is around 20KB.
The project is divided in two main parts : the client library, enabling applications to access the services provided by an UPnP "Internet Gateway Device" present on the network, and the miniupnpd daemon, providing these services to your network from a linux or bsd box being the gateway. At the moment the miniupnpd is developped on OpenBSD 3.0+ with pf. You can see some of the work I have done to integrate with pf on this page.
As pf is also available under FreeBSD, guys at the pfSense project have ported miniupnpd to this system.
For some reasons, it may be not the good solution for you to use the code from the MiniUPnP project directly.
As the code is small and simple to understand, it is a good base to take inspiration for your own UPnP implementation. The KTorrent team UPnP plugin in C++ is a good example.
If you are wondering which home router is working with the miniupnp client, you can find the answer here. In fact, you are more likely to help me fill the list by sending me an email.
Usefulness of the miniUPnP client library
The usage of the miniUPnP client library is useful whenever an application needs to listen for incoming connections.
Examples : P2P applications, FTP clients for active mode, IRC (for DCC) or IM applications, network games, any server.
The typical usage of UPnP capabilities of a router is a file tranfert using MSN messenger. The MSN Messenger software uses the UPnP API of Windows XP to open port for incoming connection. To mimic the MS software, it is a good idea to use UPnP as well.
Enhancements:
- This release adds changes to accommodate the Linux 2.6.22 kernel.

KWrite is a simple text editor, with syntax highlighting, codefolding, dynamic word wrap and more, its the lightweight version of Kate, providing more speed for minor tasks.

KWrite ships per default with KDEBASE package.

GtkHTML is a HTML rendering/editing library.

GtkHTML is not designed to be the ultimate HTML browser/editor: instead, it is designed to be easily embedded into applications that require lightweight HTML functionality