Web service

Booking Analytics platform increases your hotel's occupancy

Read VK, Twitter, Facebook and others site on RSS

RssMix

Watch the web`s best short animations

Синхронизация избранного Habrahabr`a с Pocket

Позволяет связывать разные сервисы, like IFTTT (Есть поддержка ВК)(Alpha)

Telegram Bots

Convert youtube video to mp3 (Beta)

Open source

Yandex.Mail extension for Opera

Yandex.Lenta extension for Opera <= 12

Others open source project see on Bitbucket or Github