gthnk uses plain old text files (ASCII or UTF-8) instead of a proprietary file format so that your notes will still be readable a century from now.
Bridge the physical divide. With gthnk, your timeline can directly import handwritten notes, whiteboard sketches, and other physical media.
Creating notes using mobile devices is easy: just use a filesharing service. gthnk will automatically import from multiple locations, so multiple devices will work seamlessly.