The best replacement for java applet is application.

The best alternatives to java applet are rated as following:
★★★★★  application
★★★★  javascript
★  java application
★  activex
  web start
  java servlet
  java script

Your alternative for java applet is not listed? Suggest!
Speaking about java applet, one probably shouldn't forget about object tag.

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



Google Trends

Scale is based on the average worldwide traffic of java applet in all years. Click on graph for more.
java applet
application
javascript