Zoji - As claimed by the developers of this Zoji, it caters online tools to aid you plan activities off-line.
Font Viewer - Font Viewer is an application which does exactly that - it views fonts!
Evite - Send online invitations for all occasions by email or text message. Create invites for birthdays, baby showers, save the dates, or customize your own design.
AMP Font Viewer - Jump to Download - Download.
PurpleTrail - Whether it is about birthday or wedding party or holidays, you just need to name the event and PurpleTrail will provide you the apt invitation solutions.
Fonts Ninja - Try fonts discovered on websites in any design software