MP3 tagging tool

TagScanner is a great free MP3 tagging tool. It has an extensive set of tools providing the ability to modify/edit tags on music files (batch and individual files), batch renaming of files using the tags, etc.

The website hosting this software:

http://www.xdlab.ru/en/index.htm

Keeping notes online and accessing them from anywhere

A great tool to keep notes online:

Evernote: http://www.evernote.com

It allows for creation of personal notes, saving of URLs, webpages, and pictures from web pages.

It allows synchronization of notes between various PCs, and so you can view your notes from any PC, even when offline.