MiKTeX made a major package cleanup during the last 2 weeks. (Which caused a lot of troubles btw.) Many packages were removed and renamed. Now the list is complete again.
-l3experimental
l3kernel
l3packages
-mptopdf
-bezos
-algorithms
-algorithm2e
-apacite
-apalike
-arabi
-authordate
+l3experimental
+ctablestack
babel-albanian
babel-bahasa
babel-basque
babel-ukrainian
babel-vietnamese
babel-welsh
+bezos
+frankenstein
+algorithms
+algorithm2e
+apacite
+arabi
+authordate
beamerposter
bibtopic
+caption
booktabs
braille
breakurl
+cjk
cancel
-caption
chemgreek
chicago
-cjk
covington
csquotes
endnotes
footmisc
forest
framed
-frankenstein
greek-inputenc
harvard
hyphenat
mathtools
mhchem
mongolian-babel
-miktex-hyph-mongolian
mslapa
natbib
units
prettyref
preview
refstyle
-rotating
rotfloat
sectionbox
serbianc
-miktex-hyph-serbian
setspace
soul
splitindex
stmaryrd
subfig
tcolorbox
-thailatex
+tex4ht
trimspaces
turkmen
-ucharcat
ulem
undertilde
unicode-math
url
-vntex
wallpaper
wrapfig
xargs
xcolor
-xetex-def
arydshln
braket
-cancel
colortbl
diagbox
etoolbox
sidecap
was
bera
-binhex
+libertine
ccfonts
-charter
-classico
-cmbright
-concmath
concrete
ecc
+concmath
+cmbright
eco
eulervm
feyn
-fontaxes
fourier
-fpl
garamondx
iwona
kurier
-lh
-libertine
-lm-math
+fontaxes
luxi
mathdesign
-mathpazo
minion2newtx
newtx
+binhex
symbol
tex-gyre
+classico
tipa
txfonts
-zhmetrics
+ascii-font
bbding
ifsym
marvosym
textgreek
tfrupee
-txfonts
+thailatex
wasy
wasysym
+ieeetran
a0poster
aastex
+answers
achemso
+cleveref
+mciteplus
+comment
+lineno
aguplus
-answers
apa6
-apacite
+endfloat
+sttools
apa
arabtex
+sansmathaccent
beamer
-bigfoot
-changebar
-changepage
-cite
-cleveref
-comment
+lastpage
+lambda-lists
+lh
+pst-node
ctex
-datetime
+savesym
+xecjk
dinbrief
+epsf
dtk
-ebgaramond
+filecontents
+ms
elsarticle
elsevier
-endfloat
-epsf
europasscv
+mdwtools
+tabu
+totpages
europecv
+ucs
extsizes
-fancyvrb
-filecontents
-fixme
-fmtcount
-fontawesome
frletter
g-brief
-harvard
-ieeetran
-ifmtarg
jsclasses
+fancyvrb
+upquote
kluwer
-koma-script
-lambda-lists
-lastpage
-latex2html
lettre
-lineno
-mciteplus
-mdwtools
+tugboat
memoir
-microtype
moderncv
-ms
+ebgaramond
+fontawesome
mwcls
paper
-placeins
powerdot
pst-grad
-pst-node
+koma-script
revtex
+textcase
revtex4
-sauerj
-savesym
sciposter
seminar
-shapepar
simplecv
-skak
spie
-sttools
-tabu
-textcase
-titlesec
-todonotes
-totpages
-tufte-latex
-tugboat
+cite
type1cm
-ucs
-upquote
-xecjk
-xifthen
-elocalloc
+fpl
+mathpazo
+tufte-latex
+changepage
hardwrap
+ifmtarg
ifplatform
+microtype
+sauerj
+placeins
+titlesec
+xifthen
+changebar
+fixme
+datetime
+fmtcount
+shapepar
+todonotes
+mptopdf
pgfopts
-trimspaces
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+elocalloc
+datetime2
+datetime2-german
+tracklang
+acrotex
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