ℋ𝒯ℳℒ ℰ𝓃𝓉𝒾𝓉𝒾ℯ𝓈

Not sure exactly why some came out italic, some upright. But this is a good example.

Here is some more fun:

𝔉ℜ𝔈𝔑ℭℌ 𝔖ℭℜℑ𝔓𝔗

𝕄𝕆𝔸ℝ

And you can even then copy and paste them, and they even show in the editor:

𝔖ℭℜℑ𝔓𝔗

Here is an approximation of the Dawn logo:

⧍

and some neat-o icons:

☎ ♠ ♣ ♥ ♦

Something for the old school MS Dos text-mode windows reminiscences:

^{(though you probably have to fiddle to get zero space above and below somehow to make actual boxes)}

╔═╔╗╣

Some chemistry/electricity sorta ones:

⊕⊖

Tons of mathematics and set theory ones:

A ≠ B

∫b²˙c

a few hebrew:

ℵℶ

Cyrillic:

Я НЕ ПОНЯМАЮ

Greek:

στφ

My favourite greek letter, lambda:

λ (don't forget to pack your crowbar!)

https://dev.w3.org/html5/html-author/charref