Here's a handy reference to the greek alphabet, including variants provided by LaTeX.
TeX versions are \symbol, HTML versions are &symbol;. You can right click and view source on this page to see the HTML versions.
α
β
γ
δ
ε
ζ
η
θ
ι
κ
λ
μ
ν
ξ
o
π
ρ
σ
τ
υ
φ
χ
ψ
ω
Γ
Δ
Θ
Λ
Ξ
Π
Σ
Υ
Φ
Ψ
Ω