Simple Notepad allows you to create a note whilst browsing the web and lets you create as many notes as you want.

Feature list:

 -- Create multiple notes

 -- Notes backed up to your Google bookmarks (this can be turned on/off in the Simple Notepad options)

 -- Notes synced across Chrome installations (requires Bookmark Syncing)

 -- Synchronizing on a schedule and manually force a synchronization.

 -- It will remember where you were editing the note and keep the cursor position and even the selection.

 -- Resize the note window to whatever size you like.

 -- Copy selected text to a note using a right click menu.

 -- Copy a link to a note using a right click menu

 -- Copy the page title and URL to a note using a right click menu

 -- Can choose between the classic Simple Notepad layout and an Opera Notes style layout

Because it allows me to make notes while I'm using Chrome and have separate notes for different subjects, make drafts, reminder, TODO lists and so on, which are automatically saved and made available in any Google Chrome browser instances where I'm logged on with my Gmail account.