PopChar is described as 'The character map that works! PopChar is an application that lets you insert special characters, umlauts and foreign letters into any document. With this character map, there is no need to search for or remember complex keystrokes'. There are more than 25 alternatives to PopChar for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is BabelMap, which is free. Other great apps like PopChar are Character Map (Free), WinCompose (Free, Open Source), Rocket (Freemium) and Free Virtual Keyboard (Free).
BabelMap is a free character map application for Windows that allows you to browse through the entire Unicode character repertoire of over 107,000 characters, or search for a particular character by name or by code point.
Uosk is a light tool that opens any ASCII, ANSI, UTF-8 and UTF-16 text file and converts words (e.g. separated by spaces) into buttons. Clicking one button the text snippet is pasted into any text editor (Notepad, WordPad, MS Office, OpenOffice...).
Font Viewer is an application which does exactly that - it views fonts! Arrange and view a large number fonts which are installed on your computer, applying their various styles to text of your choice.