LabyMod is described as 'It's a free client/mod for Minecraft. In it you can add friends, add mods like Optifine and ... ingame, change the animations between 1.8 and 1.7, and much much more'. There are four alternatives to LabyMod for a variety of platforms, including Windows, Linux, Mac, Minecraft and Minecraft Forge. The best alternative is Badlion Client. It's not free, so if you're looking for a free alternative, you could try PVPLounge or Sakki's Client Essentials (SCE).
The Badlion Client is an all In one Minecraft launcher with built in client anticheat, FPS improvements, mods, and much more. Once you use Badllon Client you will never want to use any other Minecraft launcher again.
Sakki's Client Essentials are plugins for Minecraft Servers and Client's. It eliminates the problems with hacked client's and gives server administrators control by restricting clients to use whitelisted plugins and mods and ends unfairness.