I did an SSL check of all the BOINC project sites... wasn't the most promising...
Results from my findings, including our main websites:

Project sites:

http://www.vdwnumbers.org/
https://www.ssllabs.com/ssltest/analyze.html?d=www.vdwnumbers.org&hideResults=on

https://albertathome.org/en-us/home
https://www.ssllabs.com/ssltest/analyze.html?d=albertathome.org&hideResults=on
grade C.

http://asteroidsathome.net/boinc/
https://www.ssllabs.com/ssltest/analyze.html?d=asteroidsathome.net&hideResults=on
grade A.

http://atlasathome.cern.ch/
https://www.ssllabs.com/ssltest/analyze.html?d=atlasathome.cern.ch&hideResults=on

http://www.bitcoinutopia.net/bitcoinutopia/
https://www.ssllabs.com/ssltest/analyze.html?d=www.bitcoinutopia.net&hideResults=on

http://burp.renderfarming.net/
https://www.ssllabs.com/ssltest/analyze.html?d=burp.renderfarming.net&hideResults=on
grade F.

http://casathome.ihep.ac.cn/
https://www.ssllabs.com/ssltest/analyze.html?d=casathome.ihep.ac.cn&hideResults=on

http://csgrid.org/csg/
https://www.ssllabs.com/ssltest/analyze.html?d=csgrid.org&hideResults=on
grade C.

http://www.climateprediction.net/
https://www.ssllabs.com/ssltest/analyze.html?d=www.climateprediction.net&hideResults=on

https://boinc.thesonntags.com/collatz/
https://www.ssllabs.com/ssltest/analyze.html?d=boinc.thesonntags.com&hideResults=on
grade B.

http://www.cosmologyathome.org/
https://www.ssllabs.com/ssltest/analyze.html?d=www.cosmologyathome.org&hideResults=on

http://denis.usj.es/
https://www.ssllabs.com/ssltest/analyze.html?d=denis.usj.es&hideResults=on

http://www.distributeddatamining.org/
https://www.ssllabs.com/ssltest/analyze.html?d=www.distributeddatamining.org&hideResults=on
grade T. certificate mismatch.

https://einstein.phys.uwm.edu/
https://www.ssllabs.com/ssltest/analyze.html?d=einstein.phys.uwm.edu&hideResults=on
grade A.

http://www.enigmaathome.net/
https://www.ssllabs.com/ssltest/analyze.html?d=www.enigmaathome.net&hideResults=on

http://findah.ucd.ie/
https://www.ssllabs.com/ssltest/analyze.html?d=findah.ucd.ie&hideResults=on

http://gerasim.boinc.ru/
https://www.ssllabs.com/ssltest/analyze.html?d=gerasim.boinc.ru&hideResults=on

http://goofyxgridathome.net/
https://www.ssllabs.com/ssltest/analyze.html?d=goofyxgridathome.net&hideResults=on

http://www.gpugrid.net/
https://www.ssllabs.com/ssltest/analyze.html?d=www.gpugrid.net&hideResults=on
grade C.

http://finance.gridcoin.us/finance/
down.

http://registro.ibercivis.es/
https://www.ssllabs.com/ssltest/analyze.html?d=registro.ibercivis.es&hideResults=on

http://boinc.gorlaeus.net/
https://www.ssllabs.com/ssltest/analyze.html?d=boinc.gorlaeus.net&hideResults=on
grade T.

http://lhcathomeclassic.cern.ch/sixtrack/
https://www.ssllabs.com/ssltest/analyze.html?d=lhcathomeclassic.cern.ch&hideResults=on
grade T. certificate mismatch.

http://www.malariacontrol.net/
https://www.ssllabs.com/ssltest/analyze.html?d=www.malariacontrol.net&hideResults=on
grade F. certificate mismatch.

http://milkyway.cs.rpi.edu/milkyway/
https://www.ssllabs.com/ssltest/analyze.html?d=milkyway.cs.rpi.edu&hideResults=on
grade A.

http://mindmodeling.org/
https://www.ssllabs.com/ssltest/analyze.html?d=mindmodeling.org&hideResults=on
grade B.

http://moowrap.net/
https://www.ssllabs.com/ssltest/analyze.html?d=moowrap.net&hideResults=on
grade F.

http://boinc.med.usherbrooke.ca/nrg/
https://www.ssllabs.com/ssltest/analyze.html?d=boinc.med.usherbrooke.ca&hideResults=on

http://nanosurf.kr.ua/nanos/
https://www.ssllabs.com/ssltest/analyze.html?d=nanosurf.kr.ua&hideResults=on

https://escatter11.fullerton.edu/nfs/
https://www.ssllabs.com/ssltest/analyze.html?d=escatter11.fullerton.edu&hideResults=on
grade A.

http://numberfields.asu.edu/NumberFields/
https://www.ssllabs.com/ssltest/analyze.html?d=numberfields.asu.edu&hideResults=on
grade T. certificate mismatch.

http://boinc.fzk.de/poem/
https://www.ssllabs.com/ssltest/analyze.html?d=boinc.fzk.de&hideResults=on

http://www.primaboinca.com/
https://www.ssllabs.com/ssltest/analyze.html?d=www.primaboinca.com&hideResults=on

http://www.primegrid.com/
https://www.ssllabs.com/ssltest/analyze.html?d=www.primegrid.com&hideResults=on
grade B.

http://quakecatcher.net/sensor/
https://www.ssllabs.com/ssltest/analyze.html?d=quakecatcher.net&hideResults=on

http://radioactiveathome.org/boinc/
https://www.ssllabs.com/ssltest/analyze.html?d=radioactiveathome.org&hideResults=on

http://ralph.bakerlab.org/
down.

http://www.rnaworld.de/rnaworld/
https://www.ssllabs.com/ssltest/analyze.html?d=www.rnaworld.de&hideResults=on
grade A.

http://boinc.bakerlab.org/rosetta/
https://www.ssllabs.com/ssltest/analyze.html?d=boinc.bakerlab.org&hideResults=on
grade C.

http://sat.isa.ru/pdsat/
https://www.ssllabs.com/ssltest/analyze.html?d=sat.isa.ru&hideResults=on

http://setiathome.berkeley.edu/
https://www.ssllabs.com/ssltest/analyze.html?d=setiathome.berkeley.edu&hideResults=on
grade F.

http://setiweb.ssl.berkeley.edu/beta/
https://www.ssllabs.com/ssltest/analyze.html?d=setiweb.ssl.berkeley.edu&hideResults=on
grade F.

http://srbase.myfirewall.org/sr5/
https://www.ssllabs.com/ssltest/analyze.html?d=srbase.myfirewall.org&hideResults=on

http://szdg.lpds.sztaki.hu/szdg/
https://www.ssllabs.com/ssltest/analyze.html?d=szdg.lpds.sztaki.hu&hideResults=on

http://boinc.umiacs.umd.edu/
https://www.ssllabs.com/ssltest/analyze.html?d=boinc.umiacs.umd.edu&hideResults=on

http://pogs.theskynet.org/pogs/
https://www.ssllabs.com/ssltest/analyze.html?d=pogs.theskynet.org&hideResults=on
grade B.

http://gene.disi.unitn.it/test/
https://www.ssllabs.com/ssltest/analyze.html?d=gene.disi.unitn.it&hideResults=on

http://universeathome.pl/universe/
https://www.ssllabs.com/ssltest/analyze.html?d=universeathome.pl&hideResults=on

http://boinc.vgtu.lt/vtuathome/
https://www.ssllabs.com/ssltest/analyze.html?d=boinc.vgtu.lt&hideResults=on

http://lhcathome2.cern.ch/vLHCathome/
https://www.ssllabs.com/ssltest/analyze.html?d=lhcathome2.cern.ch&hideResults=on
grade T. certificate mismatch.

http://lhcathomedev.cern.ch/vLHCathome-dev/
https://www.ssllabs.com/ssltest/analyze.html?d=lhcathomedev.cern.ch&hideResults=on
grade T. certificate mismatch.

http://volpexathome.cs.uh.edu/VolPEx/
https://www.ssllabs.com/ssltest/analyze.html?d=volpexathome.cs.uh.edu&hideResults=on

http://bearnol.is-a-geek.com/wanless2/
https://www.ssllabs.com/ssltest/analyze.html?d=bearnol.is-a-geek.com&hideResults=on

http://www.worldcommunitygrid.org/
https://www.ssllabs.com/ssltest/analyze.html?d=www.worldcommunitygrid.org&hideResults=on
grade A-.

http://wuprop.boinc-af.org/
https://www.ssllabs.com/ssltest/analyze.html?d=wuprop.boinc-af.org&hideResults=on
grade T. certificate mismatch.

http://yafu.myfirewall.org/yafu/
https://www.ssllabs.com/ssltest/analyze.html?d=yafu.myfirewall.org&hideResults=on
grade A.

http://www.rechenkraft.net/yoyo/
https://www.ssllabs.com/ssltest/analyze.html?d=www.rechenkraft.net&hideResults=on
grade A.

Gridcoin sites:

http://gridcoin.co/
https://www.ssllabs.com/ssltest/analyze.html?d=gridcoin.co&hideResults=on
grade T. certificate mismatch.

http://www.gridresearchcorp.com/gridcoin/
https://www.ssllabs.com/ssltest/analyze.html?d=www.gridresearchcorp.com&hideResults=on
grade T. certificate mismatch.

http://www.gridcoin.us/
https://www.ssllabs.com/ssltest/analyze.html?d=www.gridcoin.us&hideResults=on
grade C.

https://grcnode.co.uk/
https://www.ssllabs.com/ssltest/analyze.html?d=grcnode.co.uk&hideResults=on
grade A+.

http://explorer.gridcoin.asia/
https://www.ssllabs.com/ssltest/analyze.html?d=explorer.gridcoin.asia&hideResults=on