Crossplatform hex-editing software based on Python and Qt
...Microhex is an intuitive HEX editing application that enables you to view and manipulate binary data for any file in your computer.
Microhex displays the integer column and the characters column, allowing you to add new columns and delete existing ones. Each column can be assigned an unlimited number of linked address bars.
Klang is a project that allows viewing and editing of binary files in a structured way. Unlike traditional hex editors, Klang provides a hierarchical view of many binary file types that can be 'chunked', such as WAV and AIFF.