Has your Minecraft been laggy lately, or has your screen has been slow and jerky? Then you should get Optifine, which is a Mod that stabilizes and improves FPS and makes the whole game run smoother. Optifine enables the use of high definition Minecraft texture packs, and it adds a lot of customizability to the game. Also, Optifine includes a feature which lets you zoom in if you hold the left control key. Lastly, Optifine is very safe, virus-free, popular, and up-to-date with Minecraft 1.7.4.
You may be under the impression that mods are hard to install, but Optifine literally installs itself. Just download the .jar file and run it using Java. Without further ado, click here to go to Optifine's website.