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Penguin Diary
This diary application improves the accuracy of daily happiness judgments by repeatedly judging whether a day was good or not, and allows users to understand their own views of happiness.
LearnObit (Beta 3)
A web app that uses spaced repetition, a sophisticated learning algorithm, and a tree-structured note-taking tool.
Think Workflowy and Anki combined.
It also brings together various learning theories and tricks.
