Font: a set of type of one particular face and size.
FontForge is a free open source font editor available for Windows, Mac, Unix/Linux systems and localized in many different languages. It is an outline font editor and allows you to create and edit PostScript, TrueType, OpenType, svg and bitmap fonts. It also lets you convert one format to another.
FontStruct is a free browser-based typography creation tool to let you quickly and easily create your own fonts. You can download your font as TrueType. You can also share your fonts with FontStruct community, browse and download fonts uploaded by others and use in your projects.
Glyphr is a free HTML5 based font-editor. You can either explore a work in progress font or create your font from scratch with Glyphr Studio Online.
FontArk is a browser-based type design and font creation tool that supports Google Chrome or Safari. With features like real-time multiple glyph editing system and automatic outline generator, you can easily create your own font and download it as .OTF file.