PPP Keepalive is a perl script intended to maintain a persistent dialup connection. When the script redials it can then send an email containing your dynamic IP address to an email account or ftp the address to a server. This way you can obtain the current IP address for your box remotely. This also introduces security issues, so use at your own risk.
pppctl is a suite of programs suitable for use by those with ppp connections. It includes programs to facilitate charging for use of the connection, controlling the connection from a web page and selecting from a range of ISPs to use to dialup. It's also ideal for doing automated mail/news polls.
pkgbuild is a graphical development environment for Red Hat's RPM packaging format. It is designed to allow easy building and testing of RPM SPEC files. This is in the hope that more people will build and distribute quality RPMs. If your new to RPM it is important to note, you don't have to write an application to package it. You can package and redistribute any free software that the license allows open distribution.
Pklinux-bigi is a Slackware derived distribution based on glibc 2.2 and Linux 2.4.0-test11. It can run on 386, 486, 586, and Pentium machines with only 4 MB of RAM. Builtin features include IP tunneling, firewalling, encapsulation, QOS(based on ipv4 RSVP), kernel debugging, loopback, network block device, and numerous filesystems (including ntfs and sysV). It contains Apache, proftpd, bind 9.0, syslogd, sendmail, iptables, iproute2, and gated. NAT configuration by iptables is included by default. It is a loopdisk based distribution which can be directly run from DOS, no hdd partitioning needed. This distribution is kept as minimal as possible and it can be useful in places where you want a low end computer to act as a firewall, webserver, mail server, router, or an alternative to zipslack.
Pocket Linux is an almost minimal, one floppy linux system designed to quickly convert PC workstation into secure linux-based workstation using ssh to connect to remote host (other networking clients are also supported). It supports bootp for determining host IP and other network parameters (there's also manual configuration possible, but bootp is recommended). In addition to workstations equipped with a network card (ethernet or arcnet), you can also use Pocket Linux on a PC equipped with a modem. Modem is automatically detected and then PPP connection is made.
picoTK is a C GUI toolkit that requires only a minimum of memory resources. It is intended for embedded system use, especially for (but not limited to) the RTEMS realtime kernel. It is in no way comparable featurewise to a "real" full blown windows toolkit like Qt or nanoX; it rather provides simple drawing primitives like lines, filled rectangles, characters, and pixmaps. (But that is what many embedded applications might ask for.) It directly works on tailored "framebuffer" hardware. A Linux framebuffer emulator is supplied as part of the kit, making evaluation (and emulation!) possible without having a realtime OS and custom hardware.