-- Software --
Here is a list of software that is available, (oftentimes for free), that one can use to help maintain a website. As far as I can tell, it's all clean. That is to say there isn't a bunch of spyware, adware or viruses in it. (Links will open in a new Tab/Window.)
PSPad is a Programmers Editor. It's free, and is a great help editing web pages. It might be considered a huge step up from Notepad. The latest version (4.5.7 (2450) has a lot of extra help items including a small HTML Validator. In fact, I've only scratched the surface of all the features it has built in, including an FTP function. It is my editor of choice. I should note here that if you try and edit a REALLY large file, it might come up with an error. Also, if you use the Reformat Code function, be sure and thoroughly check the page. It can put spaces in places that can effect how the page shows.
Recently a script add-on has become available called Zen Coding. Some of it is repeats of features PSPad already has built in, however, there are a lot of really great shortcuts. So, if you know HTML and CSS take a look at PSPad, it will make programming a lot faster and easier.
Faststone is a great photo editing program. It's free, but if you use it for a while, I'm sure you'll want to help support it. Really, it's that good!
WS_FTP95 from Ipswitch is a good, simple FTP program that will get your pages on the web. It's free! Their website has complete instructions on setting it up.
Core FTP Lite is very similar, and is set up almost the same.
Paint.NET is a very good picture/ graphics editor, similar to MSpaint, but with more features. It is free.
CSE HTMLValidator is a good, many featured HTML Validator/HTML Editor. The basic program is free.