The best replacement for ef is ef-s.

The best alternatives to ef are rated as following:
★★★★★  ef-s
★★★  eg
★★★  efs lens
★★  ef s
★★  mft
★★  pl mount
★★  ef-s lenses
★★  efs
★★  fd
★★  af
★  ef-s lens
★  efs canon
★  ef s lens
★  nhibernate
★  fd mount
★  af lenses
★  explorica
★  pl lens
★  ef s lenses
★  fd lens
★  linq to sql
★  linq
★  f scale
★  af lens
  eg civic
  eos
  ado.net
  efs lenses
  ek
  dapper
  ef-s mount
  is lens
  af qos
  ef
  fd lenses
  ef s mount
  ejection fraction
  ef tornado
  acis
  civic eg

Your alternative for ef is not listed? Suggest!
Speaking about ef, one probably shouldn't forget about repository pattern.

Other search terms related to ef and their ratings are:
★★★★★ repository pattern
★★★ wcf
★ repository
★ poco
chf
You have in mind a companion for ef and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ef in all years. Click on graph for more.
ef
ef-s
eg