Species you should remember are in red.  Other species are included for your reference.
Most "other" species you should be able to figure out based on comparisons to
"red" species.

Hard acids

H⁺, Li⁺, Na⁺, K ⁺ , Rb⁺, Cs⁺
Be²⁺, Mg²⁺, Ca²⁺ , Sr²⁺, Ba²⁺
BF₃, Al ³⁺, Si ⁴⁺, BCl₃ , AlCl₃
Ti⁴⁺, Cr³⁺, Cr²⁺, Mn²⁺
Sc³⁺, La ³⁺, Ce⁴⁺, Gd ³⁺, Lu³⁺, Th ⁴⁺, U⁴⁺
Ti⁴⁺, Zr ⁴⁺, Hf⁴⁺, VO ⁴⁺, Cr⁶⁺,
 Si⁴⁺, Sn ⁴⁺

Soft acids

Tl⁺, Cu⁺, Ag⁺, Au ⁺, Cd²⁺
Hg²⁺, Pd²⁺, Pt ²⁺, M⁰, RHg ⁺, Hg₂²⁺
BH₃
CH₂
HO⁺, RO ⁺

Borderline acids

Fe²⁺, Co²⁺, Ni²⁺ , Cu²⁺, Zn²⁺
Rh³⁺, Ir³⁺, Ru³⁺, Os ²⁺
R₃C⁺ , Sn²⁺, Pb ²⁺
NO⁺, Sb ³⁺, Bi³⁺
SO₂

Hard bases

F^-, Cl^-
H₂O, OH^-, O^2-
CH₃COO^- , ROH, RO-, R₂O
NO₃^-, ClO₄^-
CO₃^2-, SO₄^2- , PO₄^3-
NH₃, RNH₂
N₂H₄

Soft bases

H^-, I^-
H₂S, HS^-, S^2- , RSH, RS^-, R₂S
SCN^- (bound through S), CN^-, RNC, CO
R₃P, C₂H₄, C ₆ H₆
(RO)₃P, R ₃As, S₂O ₃^2-
 

Borderline bases

Br^-
NO₂^-, N₃^-
SO₃^2-
C₆H₅NH₂, pyridine
N₂