Single winner

Non-ranked ballots

Plurality

Runoff

Range

Approval

Ranked ballots

Instant runoff voting (IRV)

Borda

Condorcet methods

Minimax

Ranked pairs

Condorcet-Hare

Multiple winner

Non-proportional

Block voting

Semi-proportional

Cumulative voting

Limited voting

Single non-transferable vote (SNTV)

Parallel

Proportional

Party list, closed or open

Mixed member proportional

Single transferable vote (STV)