Calcurse is a text-based calendar and scheduling application. It helps keep track of events, appointments, and everyday tasks. A configurable notification system reminds the user of upcoming deadlines, and the curses based interface can be customized to suit user needs. All of the commands are documented within an online help system.
NoteFinder is an application for managing any text information: notes, quotes, conversations, drafts, articles, contacts, etc. It features creating, viewing, editing, renaming, deleting entries, rich text formatting, inline calculations (e.g., use ~7+8~ to get 15, or functions and constants from Python's math module, such as sqrt, sin, and pi), organizing entries chronologically (creation dates) and semantically (tags), advanced search (with date:, tag:, title:, year:, month:, and day: parameters), saving searches, multiple notebooks, multiple backends, the ability to move/copy entries from one notebook to another, synchronizing via email/Wiki, linking entries together, CamelCase links support, and a tabbed interface.