Ranger is a file manager with an ncurses interface. It is designed to give you a broader overview of the file system by displaying previews and backviews, dividing the screen into several columns. The keybindings are similar to those of other console programs like vim, mutt, or ncmpcpp, so the usage will be intuitive and efficient.
Viable is a plugin for the Eclipse environment that provides an interface as similar to vi (specifically Vim) as possible while maintaining access to all the powerful features of Eclipse. It supports visual block mode, common normal mode actions, command line mode (including command line history), "window" splits and management, regular expression search and replacement, and external filters and commands.
Bviplus is a console ncurses based binary file editor (hex editor) with Vim-like keys and features. It can quickly open/edit/save very large files (> 2GiB). It can perform regexp-like pattern searches in hex or ASCII windows. It features search highlighting, multiple undo/redo, a tabbed multiple file interface, visual selection, cut and paste (which works between files as well), blob coloring, and more. It can run external programs on selected data, supporting any program that reads stdin and writes stdout. It has few dependencies for easy portability.
vxref provides integration of the xref tool into vim. The xref tool is a cross referencing and refactoring tool with a free version available that parses C and Java code, and a paid version that parses C++. vxref brings solid auto-completion (as opposed to all sorts of flakey varieties such as omni-complete) and accurate code browsing with scope information to vim.