PushIt!

From the Autodesk App Store:

Description

PushIt! will allow you to move elements to closer obstacles in a 3D View.

It will stop any visible element in the selected 3d view.

You can use the bounding box as the limit and also apply offset from the detected collision point.

Movements are restricted to horizontal and vertical main directions.

Auto Join – Join Multiple Elements Using Rules, and Unjoin or Cut Multiple Elements

From the Autodesk App Store:

The first release of Q'Apps for Autodesk® Revit® has the Auto Join plugin.

The Auto Join plugin features:

1. Join multi-elements according to the priority order that users want, by following the rules added.
2. The user sets the rules for the first run of the plugin. After that, the Auto Join plugin will automatically use the rules set up during the previous run.
3. Unjoin multi-elements.
4. Cut selected elements by other elements.

The interface of Auto Join plugin.