Accent marks are a must in the French language! Make it easy for you to type accent marks in Word documents, on blogs, in slideshows, etc. with one of the methods listed below.
(Windows users have several options; in my opinion, the international keyboard is far and away the best.)

On the iPad: Hold down on the letter on which you would like to place an accent. A box will pop up with options. Easy!

Method #1 The TypeIt! Keyboard
French Keyboard Type your text and then copy and paste it in a new location.

Method #2 International keyboard (Win XP)

Open your Control Panel (via Start menu or My Computer)
Double click Regional and Language Options
Click Languages
Click Details
Click Add
Pick English (United States - International)
Click OK in each dialog window.

Using the international keyboard
To type accent grave (à, è, etc.), type ` then the vowel.
Accent aigu (é), type ' (single quote) then e.
Cédille (ç), type ' then c.
Circonflexe (ê), type ^ (shift + 6) then e (or another vowel).
Tréma (ö), type " (shift + ') then o.

NOTE: To type any of these symbols by themselves (e.g., single or double quotes) rather than above a vowel, type the symbol then hit the space bar.
For example, to type c'est, type c then ' then space then e s t.

To type French quotation marks « » use ctrl + alt + [ and ], respectively.
(The minor disadvantage of the international keyboard is that it takes a little while to get used to typing a space when you actually want to type ' or ".)

Method #3 ALT key + number

To type a character hold down the ALT key while typing the number; on releasing the ALT key, the character appears on the screen. Check that Number Lock is on.

128 = Ç
130 = é
131 = â
133 = à
135 = ç

136 = ê
138 = è
140 = î

144 = É
147 = ô
149 = ò
150 = û
151 = ù

181 = Á
182 = Â
183 = À

210 = Ê
211 = Ë
212 = È
226 = Ô
235 = Ù

For the Euro sign (€), hold down the AltGr key while typing the number 4.