macOS press-and-hold is genuinely good — until you need ł, đ, ș or þ, none of which are on it. Accent Letters is a free Mac app. All 682 accented letters in the menu bar, grouped A to Z, each with its keyboard shortcut and HTML entity. Click one and it is on your clipboard. Search by the letter itself, by its Unicode name, by language, or in plain words: "two dots", "squiggle", "hat". Works offline. No account, no ads, no tracking.