I like to use WinCompose, which adds Compose key functionality to Windows. This means by pressing the set compose key (e.g. right Windows key), followed by more or less intuitive keystrokes you enter various Unicode symbols, e.g.:
- ^, h for ĥ (and analogously for ĉ, Ĝ, ĵ, Ŝ)
- U, U for Ŭ
- u, u for ŭ
- ', i for í
- ,, C for Ç
- <, < for «
- ,, , for „
- ', ' for ”
- <, 3 for ♥