There are numerous notebook apps to choose from and they can be put to many uses from brainstorming and note-taking to diary keeping and project management. RedNotebook Portable is a free portable app that has been designed for copying to your USB drive. Just because this is a portable app it does not mean that you have to make compromises on features and from the offset it is clear that this is a piece of software that has been designed with heavy usage in mind.
When you choose to use the program to organize your notes, you can make use of categories and tags to help make things easier to find. Live searching is available so when you need to track down a particular note or a piece of information you know you have noted down, it can be recalled in an instant. A nice touch is that fact that it is possible to create word clouds from the words and phrases that appear in your text most frequently.
While this is a fairly basic tool, it still has a range of formatting options. Email addresses and hyperlinks are automatically recognized and the usual bold, italic and underlining option that you would expect to find in a word processor are available. If you become engrossed in typing, autosave is on hand to ensure that your document is always saved regardless of whether you remember to do this manually, and there are a number of templates available if you are looking for inspiration for a new document.
If you are using the app for date specific material, there is an easily navigable calendar and there are various export options available that enable you to save files in PDF, HTML and other formats. All of this is provided in an easy to use app that integrates into the PortableApps suite so you can ensure that you always have the software you need to hand n matter which computer you are using.