Datacrons

Here's some info about Datacrons. I did not write this myself, credit goes to a guy named Crassus.

The Basics:
Datacrons are small cubes hidden throughout the universe of SWTOR. They either give boosts to a single stat or they give you a matrix shard. Each type of datacron has a specific color:
Strength: Red
Endurance: Green
Willpower: Purple
Cunning: Orange
Aim: White
Presence: Yellow
Shards: Also White (but instead of there being a symbol on the side of the cube these have a pattern of dots that form a cross on each side of the cube. There are 4 different colors of shards: Red, Yellow, Green, and Blue. These shards can be used to make Matrix cubes which I will talk about later.

The datacrons also glow and emit a pillar of colored light into the sky making them more visible if they are in the open. They also make a sound that you can hear when you are in the close vicinity of a datacron.

Locations by Planet:
There are a total of 66 Datacrons in the SWTOR universe. Here are their locations by planet. We did this on the Empire side but the Republic side should mirror it.

GH = Galactic Histories

Hutta:
Aim +4 (GH 1)
Presence +4 (GH 2)
Blue Shard (GH 3)

Tython:
Endurance +4 (GH 9)
Willpower +4 (GH 10)
Blue Shard (GH 11)

Ord Mantell:
Aim +4 (GH12)
Presence +4 (GH 13)
Red Shard (GH 14)

Korriban:
Endurance +4 (GH 15)
Willpower +4 (GH 16)
Red Shard (GH 17)

Coruscant:
Endurance +4 (GH 4)
Cunning +4 (GH 5)
Yellow Shard (GH 6)
Strength +4 (GH 7)
Presence +4 (GH

Dromund Kaas:
Yellow Shard (GH 18)
Strength +4 (GH 19)
Endurance (GH 20)
Presence +4 (GH 21)
Cunning +4 (GH 22)

Taris (Republic): (GH 23-27)
Aim +4 (GH 23)
Cunning +4
Green Shard
Strength +4
Willpower +4

Balmorra (Empire):
Aim +4 (GH 28)
Cunning +4 (GH 29)
Green Shard (GH 30)
Strength +4 (GH 31)
Willpower +4 (GH 32)

Nar Shaddaa:
Aim +6 (GH 33)
Cunning +6 (GH 34)
Presence +6 (GH 35)
Yellow Shard (GH 36)
Strength +6 (GH 37)

Tatooine:
Aim +6 (GH 38)
Cunning +6 (GH 39)
Blue Shard (GH 40)
Strength +6 (GH 41)
Willpower +6 (GH 42)

Alderaan:
Aim +10 (GH 43)
Endurance +6 (GH 44)
Presence +6 (GH 45)
Strength +10 (GH 46)
Willpower +6 (GH 47)

Taris (Empire):
Endurance +6 (GH 48)
Aim +10 (GH 49)
Willpower +10 (GH 50)
Presence +10 (GH 51)
Cunning +10 (GH 52)

Balmorra (Republic): (GH 53-57)
Endurance +6
Aim +10
Willpower +10
Presence +10
Cunning +10

Quesh:
Cunning +10 (GH 58)
Endurance +10 (GH 59)
Strength +10 (GH 60)

Hoth:
Cunning +10 (GH 63)
Endurance +10 (GH 64)
Presence +10 (GH 65)
Red Shard (GH 66)
Strength +10 (GH 67?) (Still haven't found this one)

Belsavis:
Aim +10 (GH 68)
Endurance +10 (GH 69)
Presence +10 (GH 70)
Green Shard (GH 71)
Willpower +10 (GH 72)

Voss:
Endurance +10 (GH 73) (Currently bugged for Imperial players)
Cunning +10 (GH 74)
Presence +10 (GH 75)
Strength +10 (GH 76)
Willpower +10 (GH 77)

Corellia:
Green Shard (GH 61)
Blue Shard (GH 62)
Aim +10 (GH 78)
Willpower +10 (GH 79)
Presence +10 (GH 80)
Cunning +10 (GH 81)
Strength +10 (GH 82)

Ilum:
Aim +10 (GH 83?, currently doesn't give a galactic history codex entry)
Endurance +10 (GH 84)
Red Shard (GH 85)
Yellow Shard (GH 86)
Willpower +10 (GH 87)

So if you add all these up you'll see that there are 9 datacrons for each stat: +4(2), +6(2), +10(5), giving you a total of +70 to each stat if you collect all the stat datacrons. You'll also notice that there are 3 shards of each color, making up the other 12 datacrons for a total of 66. I think this is a pretty nice stat increase for the work put in, not to mention the Matrix Cubes you can make with the shard datacrons. Speaking of Matrix Cubes...

Matrix Cubes (Relics):
Matrix Cubes can be created on your faction's capital planet. On Dromund Kaas they're created in the Ancient assembly chamber that is on the way to the Dark Temple. On Coruscant they're created in the Lost Assembly Vault which is directly to the West when you enter the Jedi Temple. Each character has 3 relic slots, however if you have a matrix cube on you, you cannot make another. But if you put your matrix cube in your cargo hold and return to the assembly room you can make another matrix cube. If you keep repeating the process you can make up to 4 and then equip 3 of them. I'm not sure if this is intended or a bug. I'm hoping that at release there will be other kinds of relics besides matrix cubes.
Different matrix cubes can be made depending on which color shards you put in the assembler and if you're a force user or tech user. It doesn't matter which order you put the shards in. The order the colors are listed in below is the way the game currently names the matrix cubes.
After creation matrix cubes can be broken back down into their respective matrix shards in the disassembler which is in the same area as the assembler. In order to power it you have to buy a Reconstructed Disassembler Core from a vendor on Tatooine in Mos Isla or Anchorhead depending on your faction. The Reconstructed Disassembler Core currently costs 20k.

Me and Dracarys each spent 400k testing all of these personally, so they have all been verified.

Matrix Cubes:
R = Red
Y = Yellow
G = Green
B = Blue

Lvl 15 (T2):
RBY: 11 Str, 15 End
BYG: 8 Str, 18 End
RBG: 15 Aim, 11 End
RYG: 15 End, 11 Will

Lvl 24 (T3):
RYY: 23 Str, 16 End, 5 Crit
BYY: 11 Aim, 24 End, 9 Def
GYY: 22 End, 17 Cun, 6 Crit
RBB: 16 End, 23 Will, 5 Crit
YBB: 11 Str, 24 End, 9 Def
GBB: 17 Aim, 22 End, 6 Crit

Lvl 32 (T4):
YRR: 14 Str, 33 End, 8 Acc, 10 Def
BRR: 22 End, 29 Will, 14 Crit
GRR: 23 Aim, 26 End, 16 Pow
RGG: 26 End, 23 Cun, 16 Crit
YGG: Bugged, gives YRR
BGG: 14 Aim, 33 End, 8 Shield, 10 Def

Lvl 50 (T7):
Force Users:
YYY: 24 Str, 62 End, 26 Def, 24 Surge
GGG: 50 Str, 43 End, 18 Crit, 26 Surge
RRR: 50 Will, 43 End, 18 Crit, 26 Surge
BBB: 50 Aim, 43 End, 26 Acc, 18 Crit (Possibly bugged since force users have no use for Aim)

Tech Users:
YYY: 24 Aim, 62 End, 24 Acc, 26 Def
GGG: 50 Str, 43 End, 18 Crit, 26 Surge (Also possibly bugged)
RRR: 52 End, 43 Cun, 18 Crit, 24 Surge
BBB: 50 Aim, 43 End, 26 Acc, 18 Crit

Currently you can find Matrix Prisms, Matrix emitters, and Matrix amplifiers that say they can be used to alter matrix cubes when they are being created. They can be found through archeology (not sure about other gathering skills). Currently there is no use for them in game. I imagine they will be used to make T5, T6, and T8 matrix cubes. Hopefully their uses will be more interesting than just boosting stats though.