Companies That Harm Software Freedom

Proprietary

 * Microsoft
 * Apple
 * Blackboard
 * SCO
 * Nokia
 * SAP
 * Adobe
 * Oracle
 * Qualcomm
 * Blackberry

Patent Trolls

 * MOSAID
 * Uniloc
 * MPEG-LA
 * Vringo
 * Ray Niro
 * Jay Walker
 * VirnetX

Security

 * McAfee
 * Symantec
 * Trend Micro

Proxies

 * Likewise
 * Protecode
 * T3
 * Neon
 * Wolfram Research (flagship product Mathematica)
 * Black Duck
 * Outercurve
 * OpenLogic
 * Centrify
 * Tuxera

Patent Menace

 * Nortel
 * Kodak

Reporting
Controlled Press:


 * BBC
 * IDG (parent company of IDC)
 * The Guardian
 * CNET, ZDNet (CBS)
 * New York Times
 * Slashdot

Lesser Damaging
Ambivalent:


 * Dell
 * Best Buy
 * Motorola
 * TiVo
 * Amazon
 * Samsung
 * LG
 * HTC
 * Facebook (partly owned by Microsoft)
 * VMware
 * EMC
 * Twitter
 * Goldman Sachs
 * Intel

 Non-companies:


 * CPTN
 * ITC
 * USPTO
 * EPO
 * CSIRO
 * SCOTUS
 * Court of Appeals for the Federal Circuit (CAFC)
 * FTC
 * ISO (not a company per se)
 * CCIA

Controversial GNU/Linux Players:


 * Canonical
 * Novell
 * Xandros/Linspire
 * Turbolinux

Also see the drones list.