Komodo Edit is a really good Open Source editor I recently stumbled into. It gets all the basic editing functionality right (and I am saying this as a VIM user)

Komodo Edit is a really good Open Source editor I recently stumbled into. It gets all the basic editing functionality right (and I am saying this as a VIM user). For any thing else, I believe the OS is the IDE. An OS is in particular an integrated development environment. It contains all your favorite tools to get the job done. To insist having all the functionality you need stuffed into a single unified plugin-ed application is like insisting to get the entire web into Facebook - it sucks. That said, I recently had a surprisingly pleasant experience developing a C# project with VS 2010.