Here is my compilation.Feel free to suggest more.There are some wonderful open source and slick alternatives like KLite Codec, VLC, Firefox etc. to these greedy ones.
- Real Player (Please let me know if you could find any greedier software than this)
- Adobe Reader (Someday the size will reach 100MB)
- iTunes (Minimum update size is 50MB and Quicktime, Safari bundling)
- DivX (Unwanted desktop icons and trial softwares annoyance)
- Internet Explorer (We all know how good it is)