● ○ ■ ▪ ◆ ▼ ▸ ☐ ☑ ✔ ⟂ ⊥ ∥ ∦ ℓ ♫ ♪

μ ρ x̄ σ p̂ Δ λ π θ Ω
√ × ≠ ≥ ≤ ≈ ±
← ⇠ ↑ → ↓ ⇜ ⇝
↔ ∝ ☇ ⇒

Arrows – Test for Unicode support in Web browsers
Enclosed Alphanumerics – Test for Unicode support in Web browsers
①②③④⑤⑥⑦⑧⑨⑩⑪⑫⑬⑭⑮⑯⑰⑱⑲⑳
❶❷❸❹❺❻❼❽❾❿
Latency-friendly customized bullets using Unicode characters | Nadeau Software

☃☄⌘☠๛ ★☆☁☯♛∴⌬⌨❣甴曱⊞҉ஐ… ⋱ ⋯ ⋰ ⋮♉⁂♬♪☂☏♥♡❤✌✍✏☞☺☹❀❝❞✰✪➲⌦➔

From here:
√ — alt-8730
∛ — alt-8731
² — alt-0178
³ — alt-0179
° — alt-0176
· — alt-0183
× — alt-0215
÷ — alt-0247
± — alt-0177
∫ — alt-8747
∬ — alt-8748
∭ — alt-8749
∑ — alt-8721
∏ — alt-8719
→ — alt-8594
∞ — alt-8734
≈ — alt-8776
≠ — alt-8800
≡ — alt-8801
π — alt-0960
θ — alt-0952
φ — alt-0966
δ — alt-0948
ε — alt-0949
∈ — alt-8712
∀ — alt-8704
∃ — alt-8707
∠ — alt-8736