The best replacement for sails is express.

The best alternatives to sails are rated as following:
★★★★★  express
★★★  locomotive
★★  meteor
★★  koa
★  hapi
★  geddy
★  treasure island
★  cruising sails
  biradial cutl sails
  dacron

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

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



Google Trends

Scale is based on the average worldwide traffic of sails in all years. Click on graph for more.
sails
express
locomotive