You really like your Follower but Shadowmere leaves him eating dust?
Then this is your mod. It allows your followers to summon a horse as soon as you mount yours. Have fun riding with your posse.

Features

• Horses for followers (UFO, AFT and EFF compatible, up to 15 followers' horses, scripted AI, advanced features).
• Mounted combat for followers!
• Horse Armor for both player and followers.
• Mounted combat horse charge.
• Mounted combat auto loot.
• Instant horse call with auto mounting.
• Horse whistle.
• Mounted conversations and corpse looting.
• Mounted herb harvesting.
• Fast dismounting with automatic combat weapon draw.
• Shared horse inventory with easy access.
• Switchable faction relations (friendly or neutral).
• Smart horse follow.
• Horse combat AI behavior selection (cowardly or foolhardy).
• Selective horse invulnerability and health/stamina/speed bonuses.
• Easy configuration via menu buttons and easy key customization.
• Multi Tap or Bound Key control modes (Bound Key requires SKSE).

Source: Skyrimnexus
Version: 4.4

Download:
Mirror 1 (Dropbox)
Mirror 2 (Mediafire)