This command generated this:
$ ls -lR|grep -vP "^total"|grep -vP "^./|^$|^d"|awk '{print $9}'|awk -F. '{print $NF}'|sort|uniq -c
It is not completely accurate but gives an idea.
219 (NO EXTENSION)
9 0
36 1
1 267a536740d68a0d840347285cb4567d
1 3ctype
8 a
4 acorn
9 address
38 APACHE2
1 apply
39 AUTHORS
4 b
2 bar
5 bat
1 bcrypt
8 bnf
17 BSD
1 build
1 bump-version
1 bundle
23 c
4 ca
3 cake
17 Cakefile
9 calendar
9 card
15 cc
2 cert
1 changelog
5 ChangeLog
1 CHANGELOG
17 CHANGES
1 check-prepublish
1 closure-compiler
2 cmd
4 CNAME
6 cnf
85 coffee
26 conf
3 CONTRIBUTORS
1 cpuprofile
1 crl
20 crt
2 csr
636 css
2 cssmin
2 d
10 deps
1 diff
8 Dockerfile
2 e
5 echo
134 ejs
14 eot
1 esprima
1 etsy
4 exe
3 express
2 f
1 file
1 file1
1 file2
1 file3
1 file4
1 file5
2 foo
2 Gemfile
3 gemspec
1 generate-color-images
1 gengo
1 gengoall
9 geo
50 gif
2 gitignore
17 gnu
1 go
1 gradle
1 gradlew
9 gyp
9 gypi
21 gz
1 gzip
130 h
87 handlebars
9 har-validator
2 hashes
3 hbs
1 heapsnapshot
2 htm
398 html
45 hyper-schema
12 ico
4 id_dsa
4 id_rsa
1 iml
9 in
3 info
1 ini
9 interfaces
8 jade
3 Jakefile
3 jar
9 jpg
29319 js
16 js~
1 jshint
32 jsm
5298 json
1 json~
36 json-ref
1 jsstyle
6 jst
6 key
1 land
1 lb-ng
839 less
3 lessc
55 LICENCE
424 license
35 License
2143 LICENSE
9 LICENSE-jsbn
13 LICENSE-MIT
2 LICENSE_python
45 links
2 lock
3 log
1 lsmodels
1 MAINTAINERS
254 Makefile
127 map
250 markdown
4716 md
2 md~
1 meteor
1 miller-rabin
95 min
39 MIT
8 mk
7 mkd
1 mocha
1 _mocha
1 models
2 ncp
2 needle
13 node
1 node-pre-gyp
3 NOTICE
4 nuspec
10 o
1 old
32 opts
1 orig
5 out
2 OWNERS
1 param
23 patch
6 pegjs
23 pem
974 png
12 ppk
1 prepublish
35 priv
1 Procfile
28 pub
3 py
5 Rakefile
3 rb
9 README
1 rej
1 relgen
3 render-2
3 render-full
1 run
1 run-tests
3 sass
45 schema
1 secret
1 seed
1 seeds
1 seek-bunzip
1 seek-bzip-table
17 semver
50 sh
5 shjs
1 sketch
1 source-map
2 sql
3 srl
4 ssh_host_dsa_key
8 ssh_host_rsa_key
9 sshpk-conv
9 sshpk-sign
9 sshpk-verify
1 start
2 Strongloop
1 sublime-project
1 sublime-workspace
108 svg
1 swagger
2 swf
1 switch
3 tap
3 tar
22 targ
3 test
1 __testfile
5 tgz
3 tmpl
1 TODO
4 ts
18 ttf
399 txt
16 types
1 uglify
4 uglifyjs
1 UNLICENSE
11 USAGE
14 uuid
1 VERSION
2 which
2 without_eval
23 woff
10 woff2
1 wscat
24 xml
5 yaml
25 yml
3 yuml
5 yz