PTC – The official site of Parametric Technology Corporation
PTC User – The official user group for PTC software
Java – Download the Java Software Development Kit or Java Runtime Environment
SQL Developer – Oracle’s free database query and design tool
Eclipse – My favorite development environment
Beyond Compare – My favorite file comparison tool. It’s not free but is worth every penny.
ConTEXT – My favorite text editor. No longer being updated, but very powerful.
System Administration tips
The Command Line – Useful tips on the Windows command line, batch files, and scripting