jbUnity Tools Tools for setup and maintenance of the Maya grid and cameras for creating and managing Unity assets. Includes: customizable grid divisions, Metric/Standard calculator, workflow friendly positioning of assets and an FBX batch exporter. Help and installation instructions here.

Python
Maya 2011, 2012, 2013

jbUDK Tools
Tools for setup and maintenance of the Maya grid and cameras for creating and managing UDK assets. Includes: customizable grid divisions, Unreal Unit calculator, workflow friendly positioning of assets and an FBX batch exporter. Help and installation instructions here.

Python
Maya 2011, 2012, 2013

The Rigging Toolbox

The Rigging Toolbox is a set of tools designed to aid in the process of rigging articulated characters for animation. Use individual tools from the Toolbox to aid in your personal rigging process or use the auto-rig functionality to rig full characters with features including IK/FK switching or blending and foot-roll attributes. Help and installation instructions here.

Python
Maya 2011, 2012, 2013
jbKey Me Simple utility script for setting and deleting keyframes. Helps and installation instructions here

Python
Maya 2011, 2012, 2013

jbMaya Python Notepad++ language files with syntax highlighting and autocomplete for Python and Maya. Contains syntax for the complete set of Maya functions (up to Maya 2012) as well as Python functions and operators. Help and installation instructions here. XML for Notepad++