is a note taking service in which the notes can be text, images, voice memos, handwritten notes or file attachments. There are Evernote clients available for Windows, Mac OSX, Android, iOS and WebOS, but there's no official Linux client.
On Linux, you can use NixNote (previously Nevernote)
, an unofficial Evernote client written in Java but if you want something lightweight, you should try Everpad
, a new Evernote client that integrates nicely with Unity.