Unite, fireplace, rainbow parens, vim-sexp and vim-surround are all available in Emacs with its own and better implementation.

If you want Unite equivalent, check Helm which is created before Unite and is still actively maintained. See one of Helm package demo: http://tuhdo.github.io/helm-projectile.html. The same for rainbow-parentheses. Actually, Emacs got something better than rainbow-parentheses for visual aiding parentheses: https://github.com/syl20bnr/spacemacs/issues/1173

For proper sexp manipulation, check this guide with great animations: http://danmidwood.com/content/2014/11/21/animated-paredit.ht...

For Clojure, in Emacs you got a debugger than can step expression by expression: http://endlessparentheses.com/cider-debug-a-visual-interacti...

If you want to know features for Clojure that already configured in Spacemacs, check its Clojure documentation: https://github.com/syl20bnr/spacemacs/tree/master/contrib/la...

You got all IDE features like refactoring and jump to symbols

More demos:

Here are some nice features that Emacs and its 3rd packages provide:

- Powerful automatic indentation with aggressive-indent: https://github.com/Malabarba/aggressive-indent-mode(scroll down for demos). It does not only indent the current line, but the whole semantic context around your cursor.

- Live grep:http://tuhdo.github.io/static/live_grep.gif

- C/C++ refactoring with built-in parser: https://github.com/tuhdo/semantic-refactor/blob/master/srefa...

- Lisp Code reformatting: https://github.com/tuhdo/semantic-refactor/blob/master/srefa...). As far as I know, there's none Lisp code reformatting outside of Emacs.

- Access to a list of project with a few key strokes: http://tuhdo.github.io/static/helm-projectile/helm-projectil...

- Quickly access any file in your project, as large as Linux kernel, instantly, regardless of where you are in the project, and within a few keystrokes: http://tuhdo.github.io/static/helm-projectile/helm-projectil...)

- Jump to any file depends on context, even if the file path is in a plain ASCII text file: http://tuhdo.github.io/static/helm-projectile/helm-projectil...

- Copy files from anywhere to anywhere: http://tuhdo.github.io/static/helm-projectile/helm-projectil...)

- Delete files anywhere; files are always at your finger tip to do whatever with them: http://tuhdo.github.io/static/helm-projectile/helm-projectil...

- Switch between other files with same names but different extensions: http://tuhdo.github.io/static/helm-projectile/helm-projectil...). Work not only for C/C++ but other languages, and is customizable. You don't have to configure anything, like adding include paths for the command to search. Everything is automatic. Just use it as it is.

- Jump to tag definition, from its own parser or external parser like GNu Global: http://tuhdo.github.io/static/c-ide/helm-gtags-jump-dwim.gif

- Jump up to parent: http://tuhdo.github.io/static/c-ide/senator-go-to-up-referen...

- Do you like outline tree?: http://tuhdo.github.io/static/c-ide/sr-speedbar.gif

- Interactive outline tree: http://tuhdo.github.io/static/c-ide/helm-semantic-or-imenu-w...

- Easily move back and forth using the interactive outline tree: http://tuhdo.github.io/static/part3/helm-semantic-or-imenu-2...

- References retrieved from its Emacs internal parser: http://tuhdo.github.io/static/c-ide/semantic-symref.gif

- Beautiful compile output: http://tuhdo.github.io/static/c-ide/compilation-compile.gif

- Frontend support for GDB: http://tuhdo.github.io/static/c-ide/gdb-many-windows.gif

- Code completion: http://tuhdo.github.io/static/c-ide/semantic-boost-demo.gif

- Open man page for symbol at cursor: http://tuhdo.github.io/static/part3/helm-man-woman.gif

- Emacs open 39MB C file: http://tuhdo.github.io/static/performance.gif

- Emac opens multi-gigabtye file: http://www.emacswiki.org/emacs/VLF

Note that in the demos you may see me type in the commands. You can think of it like the start menu in Windows, but actually those commands can be executed quickly with a shortcut. I type in the commands for demonstration purpose to Emacs users.

Those demos are just tip of the iceberg.