Invoice Me is an online invoicing system, with automatic billing status indicator. With the correct IDs, customers may search their own invoices, and view the payment status (with an option to hide paid invoices). It features search, add, edit, and delete admin interface. When creating a new invoice, the administrator can opt to email a copy of the invoice directly to the customer. Viewers can print the invoices easily via a Print Mode.
KOssMixer allows a user to control the hardware mixer of a sound card. It self-adjusts to the available mixer controls provided by the user's hardware and driver combination. KOssMixer provides a few unusual features not found in other mixers, including the ability to hide unused mixer controls and to rename controls to reflect their usage rather than be constrained to the generic name provided by the driver.
MRTG-eth-probe provides a probe for the Multi Router Traffic Grapher, generating statistics for network devices that do not support the SNMP protocol. It reads interface stats from /proc/net/dev (or some other file you configure), and generates an output suitable for MRTG by parsing the file. Reading of remote data via SSH is supported.
Framework for User-Space Devices (FUSD) is a Linux framework for proxying device file callbacks into user-space, allowing device files to be implemented by daemons instead of kernel code. Despite being implemented in user-space, FUSD devices can look and act just like any other file under /dev that is implemented by kernel callbacks. A user-space device driver can do many of the things that kernel drivers cannot, such as perform a long running computation, block while waiting for an event, read files from the file system, access the network, talk to a serial port, and more.
Xenomai is a realtime development framework cooperating with the Linux kernel in order to provide pervasive, interface-agnostic, hard realtime support to userspace applications, seamlessly integrated into the GNU/Linux environment. Xenomai is based on an abstract RTOS core, usable for building any kind of realtime interface, over a nucleus which exports a set of generic RTOS services. Any number of RTOS personalities called "skins" can then be built over the nucleus, providing their own specific interface to the applications by using the services of a single generic core to implement it.
apt-cacher is a CGI script which can be used by apt-get to request downloads of Debian packages (and release files) from the Net. Each downloaded file is cached into a directory, so subsequent requests for the same filename are filled from the cache. This is useful when you have multiple Debian installations to update, particularly if you are on the end of a slow Internet connection. apt-cacher is easy to install; you only need to have a local Web server on which you can place the CGI script and create a directory for the cache.