This page tracks porting progress of Python 3. The epic covering the initial port was 

Package	JIRA	Owner
base		Tim Jenness
pex_exceptions		Tim Jenness
utils		Tim Jenness
pex_policy		Tim Jenness
daf_base		Tim Jenness
pex_logging		Tim Jenness
pex_config		Tim Jenness
log		Tim Jenness
ndarray		Tim Jenness
daf_persistence		Tim Jenness
afw		Tim Jenness
skymap		Unknown User (jmatt)
geom		Paul Price
daf_butlerUtils		Unknown User (npease)
psfex	Done, no python source	Nate Lust
obs_test		Russell Owen
shapelet		Nate Lust
skypix		Paul Price
pipe_base		Russell Owen
db		Andy Salnikov
cat		Andy Salnikov
mysqlpython		Brian Van Klaveren
display_ds9		David Shupe
coadd_utils		Russell Owen
ctrl_events		Steve Pietrowicz
ctrl_pool		Fred Moolekamp
ctrl_orca		Steve Pietrowicz
ctrl_provenance		Russell Owen
ctrl_stats		Steve Pietrowicz
ctrl_execute		Steve Pietrowicz
ctrl_platform_lsst		Steve Pietrowicz
ctrl_platform_gordon		Steve Pietrowicz
pykg_config		Tim Jenness
meas_base		Russell Owen
meas_algorithms		Nate Lust
meas_extensions_photometryKron		Fred Moolekamp
meas_extensions_simpleShape		Fred Moolekamp
meas_extensions_psfex		Fred Moolekamp
meas_deblender		Fred Moolekamp
meas_extensions_shapeHSM		Fred Moolekamp
meas_extensions_ngmix		Fred Moolekamp
meas_astrom		John Parejko
meas_modelfit		Fred Moolekamp
pipe_tasks		Fred Moolekamp
pipe_supertask		Unknown User (mcarras2)
coadd_chisquared		Russell Owen
esutil		Nate Lust
scisql		Brian Van Klaveren
astrometry_net		John Parejko
ip_isr		John Parejko
ip_diffim		Meredith Rawls
datarel
obs_lsstSim		John Parejko
obs_subaru		Fred Moolekamp
obs_decam		John Parejko
obs_sdss		John Parejko
obs_cfht		John Parejko
ci_hsc		Fred Moolekamp
validate_drp
lmfit		Meredith Rawls
ngmix		Fred Moolekamp
sphgeom		Fred Moolekamp
Qserv
obs_monocam		John Parejko
dax_dbserv
dax_imgserv
dax_metaserv
dax_webserv
dax_webservcommon
pipe_drivers