The best replacement for rtm is rc.

The best alternatives to rtm are rated as following:
★★★★★  rc
★★★★  oem
★★★  toodledo
★★★  todoist
★★  wunderlist
★★  retail
★★  vl
★  vartm
★  any.do
★  gdr
★  google tasks
★  producteev
★  astrid
  ctp
  rossignol experience
  prepreg
  rtw
  modular homes
  tv3
  vista retail
  sandy
  rc1

Your alternative for rtm is not listed? Suggest!
Speaking about rtm, one probably shouldn't forget about gtd.

Other search terms related to rtm and their ratings are:
★★★★★ gtd
You have in mind a companion for rtm and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of rtm in all years. Click on graph for more.
rtm
rc
oem