THE SIMPLEST FONT + MAIL APP EVER:
You can send mail with different font on the iPhone/iPod touch/iPad, it's so easy, so cool!

Fonts list:
AcademyEngravedLetPlain
AmericanTypewriter
AmericanTypewriter-Bold
AppleGothic
Arial-BoldItalicMT
Arial-ItalicMT
ArialMT
Arial-BoldMT
ArialHebrew
ArialHebrew-Bold
ArialRoundedMTBold
Baskerville
Baskerville-Bold
Baskerville-Italic
Baskerville-BoldItalic
BodoniSvtyTwoITCTT-Bold
BodoniSvtyTwoITCTT-Book
BodoniSvtyTwoITCTT-BookIta
BodoniSvtyTwoOSITCTT-Book
BodoniSvtyTwoOSITCTT-BookIt
BodoniSvtyTwoOSITCTT-Bold
BodoniSvtyTwoSCITCTT-Book
BodoniOrnamentsITCTT
BradleyHandITCTT-Bold
Chalkduster
Cochin-BoldItalic
Cochin-Italic
Cochin-Bold
Cochin
Copperplate-Bold
Copperplate
Courier
Courier-Oblique
Courier-BoldOblique
Courier-Bold
CourierNewPS-BoldMT
CourierNewPS-ItalicMT
CourierNewPS-BoldItalicMT
CourierNewPSMT
DBLCDTempBlack
Didot-Italic
Didot
Didot-Bold
Futura-Medium
Futura-CondensedExtraBold
Futura-MediumItalic
GeezaPro-Bold
GeezaPro
Georgia-Bold
Georgia-BoldItalic
Georgia-Italic
Georgia
GillSans-BoldItalic
GillSans-Bold
GillSans
GillSans-Italic
STHeitiJ-Medium
STHeitiJ-Light
STHeitiK-Light
STHeitiK-Medium
STHeitiSC-Light
STHeitiSC-Medium
STHeitiTC-Light
STHeitiTC-Medium
Helvetica-Oblique
Helvetica-BoldOblique
Helvetica
Helvetica-Bold
HelveticaNeue
HelveticaNeue-BoldItalic
HelveticaNeue-Bold
HelveticaNeue-Italic
HiraKakuProN-W6
HiraKakuProN-W3
HiraMinProN-W3
HiraMinProN-W6
HoeflerText-Black
HoeflerText-Italic
HoeflerText-BlackItalic
HoeflerText-Regular
MarkerFelt-Wide
MarkerFelt-Thin
Optima-BoldItalic
Optima-Regular
Optima-Bold
Optima-Italic
Palatino-Italic
Palatino-Bold
Palatino-Roman
Palatino-BoldItalic
Papyrus
PartyLetPlain
SnellRoundhand-Bold
SnellRoundhand
Thonburi-Bold
Thonburi
TimesNewRomanPSMT
TimesNewRomanPS-BoldMT
TimesNewRomanPS-BoldItalicMT
TimesNewRomanPS-ItalicMT
TrebuchetMS-Italic
Trebuchet-BoldItalic
TrebuchetMS
TrebuchetMS-Bold
Verdana-BoldItalic
Verdana
Verdana-Bold
Verdana-Italic
ZapfDingbatsITC
Zapfino

Have fun.