My AX char config with customizations for Latin and Chant; You can get AX here: http://vulpeculox.net/ax/

AX.cfg

;Brother Gabriel-Marie's AX char config
;March 17, 2015
;You can get AX here: http://vulpeculox.net/ax/
; -------------------------------------------------------------------
; HOTKEY
; -------------------------------------------------------------------
; Tells which hot key to use.
; Possible values are F1 ••• F12
; -------------------------------------------------------------------
KEY=F9

; -------------------------------------------------------------------
; CHARACTER CYCLE SETS
; -------------------------------------------------------------------
; This is a library of possible cycles
; <Set_name>=<character cycles>
; • Each cycle MUST finish with the start character
; • If you add sets you think might be useful to others
;   feel free to email AX@PeterFox.ukfsn.net
; • Last updated 16th January 2009  (Extra French characters)
; -------------------------------------------------------------------
Latin=aáæǽa AÁÆǼA eéëe EÉËE iíi IÍI oóœo OÓŒO uúüu UÚU 
Symbol=£€£ $¢$ c©c .•…. <«< >»> v℣v r℟r V℣V R℟R t†t +✠+ p☧p m♫m
Catalan=aàa AÀA cçc CÇC eéèe EÉÈE iíi IÍI oóòo OÓÒO uúüu UÚÜU 
Danish=aåæa AÅÆA oøo OØO
Estonian=aäa AÄA oöõo OÖÕO sšs SŠS uüu UÜU zžz ZŽZ
Finnish=aäa AÄA oöo OÖO uüu UÜU
French1=aàâäa AÀÂÄA cçc CÇC eéêèëe EÉÊÈËE iîïi IÎÏI oôo OÔO uûùüu UÛÙÜU
French=aàâäæa AÀÂÄÆA cçc CÇC eéêèëe EÉÊÈËE iîïi IÎÏI oôöœo OÔÖŒO uûùüu UÛÙÜU
German=BßB aäa AÄA eée EÉE oöo OÖO uüu UÜU
Icelandic=aáåæa AÁÅÆA dðd DÐD iíi IÍI oóöo OÓÖO pþp PÞP uúµu UÚU yýy YÝY
Italian=aáa AÁA eéèe EÉÈE iíìi IÍÌI oòo OÒO uùu UÙU
Portuguese=aáâàãa AÁÂÀÃA cçc CÇC eéêe EÉÊE iíi IÍI oóôõo OÓÔÕO uúu UÚU
Spanish=aáa AÁA eée EÉE ií¡i IÍI oóo OÓO uúüu UÚÜU ?¿? nñn NÑN
Swedish=aåäa AÅÄA oöo OÖO
Math= 0°²³0 /÷/ +±+ *×* uµu 2½¼¾2 3⅓⅔3 8⅛⅜⅝⅞8

; -------------------------------------------------------------------
; DEFAULT SETS
; -------------------------------------------------------------------
; Provide a list of set names seperated by commas
; • Order may be important.  Early cycles will mask later ones
; • See AX_ReadMe.txt for how to override this using a shortcut
; -------------------------------------------------------------------
SETS=Latin,Symbol,French,Math,Spanish

; -------------------------------------------------------------------
; MISC SETTINGS
; -------------------------------------------------------------------
; Delay before splash screen is automatically closed (seconds)
SPLASHDELAY=200

; Instruction text
HOWTO=Press *KEY* to modify character on left of cursor.<BR>Repeat until the required character appears.

; Information text 
INFO=The current character cycles are:

; More information text
MOREINFO=For more information see the file ax_readme.txt<BR>or visit 

With AX you set the hotkey, then type a character, then push the hotkey to change that character into something else. I didn't write the script, but I want to share my config file.

You can use the same character to swap multiple times. For example, below: if you start with number 2, then push F9, you get ½ but if you push F9 twice, you get ¼ and 3 times gets ¾.

I added fractions via the 2 key(½ ¼ ¾), 3 key(⅓ ⅔) 8 key(⅛ ⅜ ⅝ ⅞) and the music symbol (♫).