• Simple majoritarianism

• Plurality  (First-past-the-post · Two-round · Exhaustive ballot)

• Preferential systems
  • Borda count
  • Bucklin voting
  • Condorcet methods  (Copeland's · Kemeny-Young · Minimax · Nanson's · Ranked pairs · Schulze)
  • Coombs' method
  • Instant-runoff (alternative vote)
    • Contingent vote
  • Oklahoma primary electoral system

• Rated systems  (Range voting · Approval voting · Majority Judgment)

• Proportional representation
  • Party-list  (open · closed · mixed · local)
    • Highest averages  (D'Hondt · Sainte-Laguë)
    • Largest remainder  (Hare quota · Droop quota · Imperiali quota)
  • Single transferable vote  (CPO-STV · Schulze STV · Wright system)
• Binominal System

• Semi-proportional representation
  • Additional member system
  • Alternative Vote Plus
  • Cumulative voting
  • Limited voting
    • Single non-transferable vote
  • Parallel voting

• Majoritarian representation
  • Plurality-at-large
  • Preferential block voting
  • General ticket

• Delegable voting
• Delegated voting

• Demarchy
• Sortition
• Random ballot

Even more about free public proxies