iMPROVE .NET is an open source deobfuscator for packers and obfuscators that de4dot can't unpack or deobfuscate correctly and fully like string decryption.

Current supported packers:

->DotBundle (as a packer)
->OrangeHeap Obfuscator
->Obfuscar
->DotWall Obfuscator
->NetObf-Protector
->Phoenix Protector
->Macrobject Obfuscator .NET 2009
->DotNet Spin
->ExePack .NET
->NetZ .NET Packer
->netshrink
->Sixxpack
->.NETPack
->RPX
->MPRESS
->Castle Crypter v0.1

looking to take a look at it