A Little Background Information
jEdit has features that aid in better source code editing (like auto indent) and a powerful search and replace tool that supports both literal and regular expressions. It also supports multiple file search and replace and reverse search. jEdit is customizable to a great extent and things like syntax highlighting can be easily customized using XML files. jEdit support plug-ins and there are quite a number of plug-ins available that extends its functionality.
Notepad++ is a source code editor that has been designed as a replacement for the Windows Notepad. It is lightweight and optimized for better performance. Main features of Notepad++ includes syntax highlighting, tabbed document view, plug-in support etc. Notepad++ supports over 50 languages.