LinuxISO.org, a place to learn about, download, and discuss Linux.
DistroWatch.com: Put the fun back into computing. Use Linux.
The Portland Linux Users Group was formed to learn more about the Linux operating system, to help others use and learn Linux, to advocate the use of Linux, and to share ideas about Linux. They have monthly meetings and weekly clinics.
The Linux Gazette helps with configuring and using Linux.
Go to Cygwin to get a set of utilities that allow you to run BASH, vi, etc. on your PC.
PostgreSQL is a sophisticated Object-Relational DBMS, supporting almost all SQL constructs, including subselects, transactions, and user-defined types and functions. It is the most advanced open-source database available anywhere. You can get ODBC drivers for PostgreSQL, allowing you to connect to it from database tools on PCs, such as BDE and Microsoft Access.
MySQL is a true multi-user, multi-threaded SQL database server. SQL is the most popular database language in the world. MySQL is a client/server implementation that consists of a server daemon mysqld and many different client programs and libraries. (support forums)
OpenOffice.org, an application suite for Linux, Windows, etc. It is free! OpenOffice will allow you to load and save most Microsoft Office documents.
OOoMacros is a repository for OpenOffice.org (OOo) macros/add-ins, and documentation about writing macros and/or extending OpenOffice.org.
8daysaweek, a site for users of the OpenOffice.org office suite. They have macros available for download.
Dia is an open source application for creating technical diagrams. Its interface and features are loosely patterned after the Windows program Visio. Features of Dia include multiple-page printing, export to many formats (EPS, SVG, CGM and PNG), and the ability to use custom shapes created by the user as simple XML descriptions. Dia is useful for drawing UML diagrams, network maps, and flowcharts. It's available for Linux, Windows, etc.