Free OnboxApp – Topo, Building and Grid Tools

From the Autodesk App Store:

Originally created in 2014 as a collection of macros to improve and speed up workflows for multi-story buildings, it had its first public release in September 2016 as an Autodesk® Revit® application. It became very popular in Brazil and other countries like Spain, Mexico, and Portugal, helping AEC students and professionals across 39 different countries to be more productive and efficient.

The tool is available in English or Brazilian Portuguese depending on the language of Revit that you have launched.

The Slope Grading Command

REVMo8 – A Revit Productivity Suite

From the Autodesk App Store:

REVMo8 greatly simplifies working in Autodesk® Revit®.

Powerful tools to improve productivity and speed up your design process.

Use REVMo8 to do much of your work in Revit from drawing grid lines, 3D Stick Frame, 3D modeling, visibility control, material takedown and more. Every step is fully automated and hides the complexity of doing it manually. REVMo8 is perfect for those new to Revit.

Features include:

• Building Boundary and Column Grids: Quick and easy way to generate column grids and dimensions. Grids are automatically shown in 3D view as well as plan views.
• 3D Stick Frame: Manual and Automatic generation of 3D stick frames. Stick Frames are used for 3D modeling as well as massive buildings visibility control.
• Level Manager: Tools to manage all aspects of levels operations without dealing with the graphics screen.

Free Grid Manager

From the Autodesk App Store:

When working with BIM models, it is very likely that a model needs to update certain grids or level names during the project's lifetime. If the dimensions of the project are relatively large, then the task of renaming the grids and levels becomes tedious. Autodesk® Revit® plugins attempt to make tedious tasks simple and straightforward. Therefore, this tool provides a shortcut for editing the project grids. Use Grid Manager for renaming your project's grids swiftly. This plugin allows you to define a base name for your grid lines and either a numeric or alphabetic increment.

For example:

• Base name: "Axis " + Increment: numeric, starting with 1, produces: "Axis 1", "Axis 2", "Axis 3", etc.
• Base name: "Axis " + Increment: alphabetic, starting with A, produces: "Axis A", "Axis B", "Axis C", etc.

Ribbon button

Free ReviTea Grid/Level

From the Autodesk App Store...

Trim and Extend tool doesn't work with Grid and Level. Extent end of Grid and Level have two modes: 3D model extent mode and 2D view specific extent mode. It's not easy to switch between two extent modes and drag their ends, especially if there are lots of Grids or Levels. It's tedious to click one by one to show or hide bubbles of many Grids or Levels. ReviTea Datum tools could make your work easy.

• Trim Grids tool works similarly to the Trim and Extend tool of Autodesk® Revit®. With it you can easily trim or extend one or more Grids to a boundary defined by Grid, Level, Reference Plane or Detail Line.
• Trim/Extend Grid 3D: Trim or extend Grid 3D extents to the reference (Grid, Level, Reference Plane or Detail Line) as a boundary. Grids 2D extent will switch to 3D extent.
• Trim/Extend Multiple Grids 3D: Trim or extend multiple Grids 3D extents to the reference (Grid, Level, Reference Plane or Detail Line) as a boundary. The extent end of a Grid that is close to the boundary is trimmed or extended. Grids 2D extents will switch to 3D extents.
• Trim/Extend Grid 2D: Trim or extend a Grid 2D extent to the reference (Grid, Level, Reference Plane or Detail Line) as a boundary. Grids 3D extents will switch to 2D extent.
• Trim/Extend Multiple Grids 2D: Trim or extend multiple Grids 2D extents to the reference (Grid, Level, Reference Plane or Detail Line) as a boundary. The extent end of a Grid that is close to the boundary is trimmed or extended. Grids 3D extents will switch to 2D extents.
• Set Grids 3D Height: Set Grids 3D (model) extents in vertical direction by defining levels and offset.
• Trim Levels tool works similarly to Trim and Extend tool of Revit. With it you can easily trim or extend one or more Levels to a boundary defined by Grid, Reference Plane or Detail Line.
• Trim/Extend Level 3D: Trim or extend Level 3D extents to the reference (Grid, Reference Plane or Detail Line) as a boundary. Levels 2D extent will switch to 3D extent.
• Trim/Extend Multiple Levels 3D: Trim or extend multiple Levels 3D extents to the reference (Grid, Reference Plane or Detail Line) as a boundary. The extent end of a Level that is close to the boundary is trimmed or extended. Levels 2D extents will switch to 3D extents.
• Trim/Extend Level 2D: Trim or extend a Level 2D extent to the reference (Grid, Reference Plane or Detail Line) as a boundary. Levels 3D extents will switch to 2D extent.
• Trim/Extend Multiple Levels 2D: Trim or extend multiple Levels 2D extents to the reference (Grid, Reference Plane or Detail Line) as a boundary. The extent end of a Level that is close to the boundary is trimmed or extended. Levels 3D extents will switch to 2D extents.  
• Switch Bubbles can show or hide multiple Grids/Levels bubbles according to a boundary defined by Grid, Level, Reference Plane or Detail Line.