Align and Distribute Tools is a free Blender add-on, as the name says, created to make aligning and distributing objects easier.

Features:

• Align object location
• Distribute objects evenly
• Distribute objects using a fixed spacing

Check the instalation instructions here

• Aligning objects
  • Select at least two objects
  • Select the active object ( the algorithm will align the objects based on this one).
  • Click on one of the alignment options X, Y or Z
• Distribute objects evenly
  • Select at least three objects
  • Click on one of the distribute evenly options X, Y or Z
    • In this mode, the algorithm will distribute the objects evenly between first and the last element
• Distribute objects using a fixed spacing
  • Select at least two objects
  • Select the active object ( the algorithm will distribute the objects starting from this one).
  • Adjust the spacing (gap field)
    • Positive or negative values are accepted
  • Click on one of the distribute with gap options, X, Y, or Z.

Found a bug? Have any feedback? Feel free to open an issue