PDU/ASCII conversion functions convert between an ISO-8859-1 ASCII string and a PDU-encoded array of bytes as described in ETSI GSM 03.38 and ETSI GSM 03.40. A PDU-encoded message is necessary for sending an SMS using a cell phone that does not support plain ASCII mode (like most phones from Ericsson).
smtpsend is a simple SMTP client to transmit an email message to an SMTP server. It is designed for use by programs that need a simple, flexible way to send email, or for experimenting with SMTP. In many cases, sendmail can do what this program does, but it is much more complex, harder to set up and use, and doesn't give you as much lower level control. This program is written in Perl and is based on Perl's Net::SMTP module. It makes a great starting point for writing SMTP client functions into your own Perl program.
Aerial Chat is a powerful chat system. It is easy to install, and features a no flicker update, kick, ban, iptracer, toplists, DHTML layers, unlimited channels, private messaging, a spy mode, telescriptor, images, links, easy smiley management, jail mode, MP3s, graphic effects, and a nice design.
The rcpod (Remote Controlled PIC of Doom) project is based on firmware for the PIC16C745 or PIC16C765 microcontrollers that executes I/O operations on behalf of the USB host. Included are libraries for C and Python programs to access the rcpod device, PCB layouts for rcpod devices, and example programs. It currently supports basic general-purpose I/O, pulse-width modulation, synchronous and asynchronous serial, and RS-485.