The best replacement for pdb is epub.

The best alternatives to pdb are rated as following:
★★★★★  epub
★★★★  prc
★★★  dll
★  ipdb

Your alternative for pdb is not listed? Suggest!
Speaking about pdb, one probably shouldn't forget about release build.

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



Google Trends

Scale is based on the average worldwide traffic of pdb in all years. Click on graph for more.
pdb
epub
prc