Uses: Shoot arrows, splash potions, fire charges, snowballs, bottles 'o' enchanting, and eggs at enemies/ mobs/ yourself; summon mods from spawn eggs; give you items; put minecarts directly on a rail and boats into water at the push of a button; dispense lit TNT; launch fireworks; dispense and un dispense water and lava
Uses: Transferring items into chests or other containers; giving you items, does not shoot projectiles; less expensive than hopper, but needs a redstone signal to activate.
Uses: Pushing blocks; good for traps and many other things; can only push a max of 12 blocks in any direction.
|Wood Planks||Wood Planks||Wood Planks|
Sticky Piston 
Uses: Same as piston, but can also pull blocks.
Uses: Trasport items to/ from chests or other containers, without a redstone signal.
|Iron Ingot||None||Iron Ingot|
|Iron Ingot||Chest||Iron Ingot|
Redstone Lamp 
Uses: Light up places; powered by redstone; can be turned on and off.
|Redstone Dust||Glowstone||Redstone Dust|
Daylight Sensor 
Uses: Emits redstone signal when it is day, can be inverted into a nightime sensor (1.8); much more efficient lamps.
|Nether Quartz||Nether Quartz||Nether Quartz|
|Wooden Slab||Wooden Slab||Wooden Slab|