Alphapolyglot, 8 languages, 37 bytes, score 0.09912536443

I'll try to explain it later, but I don't know how it works yet.

Alphapolyglot, 8 languages, 37 bytes, score 0.072265625

The first line is executed first.

8 # Return 8 

The second line isn't executed.

Alphapolyglot, 7 languages, 34 bytes, score 0.09912536443

"6";7iiiio hkaeeeaeaeawxzz ax zaCM 

Features AlphaBeta, Beatnik, Commentator, Deadfish~, evil, Foo, Golfscript. I can't find any good language for H, so I think this is where it stops.

"6";7iiiio hkaeeeaeaeawxzz a # Garbage x z # Clear register 1 and 3 a # Add 1 to register 1 C # Set register 3 to register 1 M # Output register 3 as a number 

"6"iiiio hkaeeeaeaeawxzz ax zaCM is 5 50 9 17.

"6";7iiii # Increment 4 times o # Output as a number h # End program kaeeeaeaeawxzz ax zaCM # Garbage 

"6";7iiiio hk # Garbage aeeeaeaea # Increment and weave the accumulator to 53 (5 in ASCII) w # Output accumulator as a character xzz ax zaCM # More garbage 

"6" # Output 6 ;7iiiio hkaeeeaeaeawxzz ax zaCM # Garbage 

"6" # Push the string 6 ; # Pop and discard 7 # Push 7 iiiio hkaeeeaeaeawxzz ax zaCM # Garbage 

Alphapolyglot, 8 languages, 37 bytes, score 0.09912536443

8 "6";;7iiiio hkaeeeaeaeawxzz ax zaCM 

Features AlphaBeta, Beatnik, Commentator, Deadfish~, evil, Foo, Golfscript, and Husk. Thanks to Leo for helping with Husk.

8"6";;7iiiio hkaeeeaeaeawxzz a # Garbage   x z # Clear register 1 and 3   a # Add 1 to register 1   C # Set register 3 to register 1   M # Output register 3 as a number 

iiiio hkaeeeaeaeawxzz ax zaCM is 5 50 9 17.

8"6";;7iiii # Increment 4 times   o # Output as a number   h  # End program   kaeeeaeaeawxzz ax zaCM # Garbage 

8"6";;7iiiio hk # Garbage   aeeeaeaea # Increment and weave the accumulator to 53 (5 in ASCII)   w # Output accumulator as a character   xzz ax zaCM # More garbage 

8 # Garbage "6"  # Output 6  ;;7iiiio hkaeeeaeaeawxzz ax zaCM # Garbage 

8 # Push 8 "6"  # Push the string 6 ;;  # Pop and discard twice   7 # Push 7   iiiio hkaeeeaeaeawxzz ax zaCM # Garbage 

Husk

I'll try to explain it later, but I don't know how it works yet.

Features AlphaBeta, Beatnik, Commentator, Deadfish~, evil, Foo, Golfscript.

Features AlphaBeta, Beatnik, Commentator, Deadfish~, evil, Foo, Golfscript. I can't find any good language for H, so I think this is where it stops.