Curved-hilt lightsaber—A standard design during the prime of Form II lightsaber combat, curved hilts allowed more precise movements as well as reasonable flexibility in lightsaber-to-lightsaber combat. The curved hilt also provided a challenge when defending against it, because the wielder would strike a slightly different angle than with a normal hilt. It was also more complex and gave the maker more of a challenge in aligning its crystals.
Dual-phase Lightsaber—This rare type of lightsaber used a combination of focusing crystals to create a blade that could extend up to double the original length with a simple activation. Unlike typical lightsabers, which often possessed a manual adjuster for reducing the blade emission, the dual-phased blade could be triggered in an instant, adding an element of surprise to catch an opponent off guard.
Short Lightsaber or Shoto—A lightsaber employing a shorter blade than the more common lightsaber. The smaller blade allowed for easier use in combat by those Jedi who were of a smaller stature,
Underwater Lightsaber—While most lightsabers short out when the blade touches water, this blade was made to operate underwater due to two crystals employing a bifurcating cyclical-ignition pulse.
Double-bladed lightsaber—also called a Saberstaff, Lightsaber Lance, Doublesaber, or Lightstaff, had a longer-hilt version of the standard lightsaber, and could emit a blade from both ends. This is the most common of the rarer forms of lightsabers. Each blade could be activated independently of one another or simultaneously. It could be one hilt or two normal lightsabers attached together. This was often even more dangerous to the untrained wielder than to the opponent. It came to be known as a "Sith lightsaber" because it was preferred by Sith and was possibly invented by Dark Lord of the Sith Exar Kun, whose lightsaber was both double-bladed and dual-phase. This made his personal style of lightsaber combat very complex, as he would vary the strength and length of either blade independently; sometimes letting the opponent's blade pass right through his, sometimes blocking. WARNING YOU HAVE A VERY VERY LOW CHANCE TO GET THIS LIGHTSABER.
Great Lightsaber or Lightclub—Special focusing crystals and power systems enabled this rare lightsaber to project a blade up to 3 meters in length. These large lightsabers were generally used only by beings of immense stature.
Fiber-cord linked lightsaber - A Fiber-cord linked lightsaber was a form of the dual-blade lightsaber, except that the hilts of this weapon were joined by a fiber cord. More difficult to control than a double-bladed saber, the fiber cord joint of the weapon gave the wielder the benefit of striking from unexpected angles.
Forked lightsaber—This form of twin-bladed lightsaber was essentially a regular crystal lightsaber with a second emitter coming out of the hilt at a 45-degree angle to the axis of the lightsaber. In addition to being the most unusual of lightsaber designs, and subsequently the most rare, the hilt was also slightly curved.