Adobe
Despite the PR, Adobe is not a friend of GNU/Linux and certainly not of Free software. Some of the following posts explain why.
Adobe Offers Proprietary Drugs to Students, Then Cracks Down on Schools
NSW (Australia) Didn’t Choose Free Software Because It Doesn’t Run Non-Free Software???
Adobe Flash: Now a Little Less Evil (We’ll Stick to Ogg, Thank You)
Wither Web Standards? (The Adobe and Microsoft Threat)
Adobe Trash Player and Novell/Microsoft Mono
Adobe Turns to Linux After Apple Snub
Microsoft More Likely to Split Than to Merge With Adobe
Adobe Joins Novell in Daemonising Oracle and Whitewashing Microsoft