Google Notebook!

Made by the company behind WordPress , Simplenote is an easy way to keep notes, lists, ideas, and more. Your notes stay updated across all your devices. No buttons to press. It just works. Your notes are synced across your devices when you create, add to or change them.

QOwnNotes is the open source plain-text notepad with markdown support and todo-list manager for Linux, Mac OS X and Windows, that works together with the notes application of ownCloud.

Online Notebook application: Zoho Notebook lets you combine text, images, audio, video, RSS feeds, documents and much more. Online Collaboration: You can share a single image or selection of text from a page rather than the whole document, giving the author absolute control over what information is shared with others. Notebook also provides real-time collaborative editing. Firefox plug-ins for instant web clipping; Skype integration for instant chat and IP telephony.

GNotes is an Android notepad/notebook that can synchronize with Google GMail.

list.it is a simple, free, open-source (MIT-license) note-keeping tool to help you manage the tons of little information bits you need to keep track of each day. Installs as i Firefox add-on.

Gubb is a free web-based application with an easy-to-use interface that enables you to create, manage and share an unlimited number of lists, as well as retrieve whole lists by text message & email.

An online notebook, which will help you organise your informations. It will allow you to create Pages consisting of notes, images, to-dos, files... You can keep them for yourself or share with your coworkers, friends and family.

Notepin offers a dead simple way to create public notebooks for free, with no registration required. And for a small premium, you can upgrade to password protect your notes.

Jottinx: take your notes wherever you go.