Kana Tab is a Google Chrome extension for learning Japanese kana. It has two modes; flashcard mode and reference table mode.
Flashcard Mode - Presents a random kana and its transliteration when a new tab is opened.
Reference Table Mode - Presents a set of kana tables to be used for reference when a new tab is opened.
The sets of kana the user wishes to study can be configured using the options menu. This allows students of different stages of study to use the extension effectively. For instance only hiragana could be used for a beginner then they could add in katakana later.
The source code for Kana Tab may be found on my Github profile.