Pure ruby gems:
Ruby guitar chords generator library & cli tool, which also contains some abstraction for musical mathematics. Chords generator is a common but a not only mission, the library is ready for extending for generating scales.
гем для склонения по падежам заголовков на русском языке.
Ruby on Rails Gems:
handy development tools for the Rails Console.
Better plays with pry.
Rails Boot Inquirer:
the implentation of the "Boot Inquirer" component to control booting and
mounting isolated engines and dependent gems for current process using enviroment
the very small gem that simply stores flash messages in the X-Message
header for XHR requests and then shows them like a growl
(uses the fork of jQuery Growl plugin).
TextMate 2 goodies:
Ruby on Rails Missed TextMate bundle:
updates old stuff from the official bundle and adds many other magic commands & snippets,
which I assure you'd love to.
TextMate Bundle Support CLI:
TextMate bundle development tool, provides some automatization commands, helps to order
bundle menu items and repairs missed names for command sources.