Open Source Software that I use

I mentioned Ubuntu and Asterisk in a different post, because it related to an easy and nearly free PBX solution. In addition, I find the following tools valuable:

• MySql - Open Source relational database software. It's fantastic and behind some of the largest internet sites in the world.
• FileZilla - Open Source FTP/SFTP software.
• Putty - SSH to a linux box from Windows. This is great for gaining access to your hosted servers from a client PC running windows.
• PocketPutty - Same as above, but from your Windows Mobile/Pocket PC device. In my case, Treo 700wx cell phone.
• Ruby on Rails - Open Source Web Development framework built around the MVC (Model-View-Controller) design pattern. Hey, it's great in my opinion and I built a solution for our company on it in no time.
• TightVNC - Like PCAnywhere, but Open Source. Remotely control other computers from this lightweight, low-footprint tool. Note: TightVNC is built upon VNC.
• OpenOffice - I use this to avoid licensing costs from Microsoft. When starting a small company, you have to save as much money as possible. This was a tough one for the kids - because they all use MSOffice at school. They have gotten used to it though! One very valuable feature that I like about it: I can save all my documents to PDF NATIVELY, without having to use Acrobat or some other print driver. It does a good job of preserving the format from MS Office documents. It's not just a writer, but also a spreadsheet tool that works very much like Excel, a presentation tool, etc...
• Thunderbird - An Open Source Mail client. Hey, this isn't as good as Outlook (IMHO), but it does the job. Besides, I don't have Outlook! I choose this tool over Outlook Express.
• RadRails (now Aptima Studio) - Development environment for Ruby on Rails development.
• Apache - Open Source Web Server. I don't know the current market saturation, but if not number one then number two behind IIS.
• ... If I come up with others, then I will make a new post for them. If too many others, then I'll consolidate into a new post. I think this is it for now. BTW, I'm ONLY putting down items for Open Source Software that I use, or use regularly! The list of tools available via OpenSource is AMAZING and my list doesn't even touch the surface of what's available.