The best replacement for 3.5 is pathfinder.

The best alternatives to 3.5 are rated as following:
★★★★★  pathfinder
★★★★★  2.5 hard drive
★★★★  4e
★★★★  2.5 hdd
★★  2.5 external hard drive
★★  2.5
★★  5.0
★★  5.25 hdd
★★  2.5 internal hard drive
★★  4.0
★★  2.5 ssd
★  2.8
★  4 inch screen
★  3 inch shell
★  2.5 hard drive performance
★  2.5 hard drives
★  3.8 pajero
★  4 dungeons and dragons
★  2.5 sata
★  4th edition
★  2.5 drives
★  2.5 sas
  6.3
  4.0 .net
  3.6
  2.5 drive
  3.7
  3 inch shells
  2.5 mm jack
  5.0 f150
  3.9 impala
  3.0
  2.5 hard drive reliability
  4 screen
  3.9
  asp.net 4.0
  2.0

Your alternative for 3.5 is not listed? Suggest!
Speaking about 3.5, one probably shouldn't forget about visual studio 2005.

Other search terms related to 3.5 and their ratings are:
★★★★★ visual studio 2005
★★★ .net 4.0
You have in mind a companion for 3.5 and it is not yet here? Propose!



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3.5
pathfinder
2.5 hard drive