A) Flash Player
Flash player in the repository didn't install flash player by default because, adobe updated their flash player and the default package gave checksum error.
I followed the ubuntuforums link here
And downloaded the new .deb file from http://launchpadlibrarian.net/10761023/flashplugin-nonfree_126.96.36.199ubuntu2_i386.deb
It installed beautifully.
B) MS core true type font
sudo aptitude install msttcorefonts
C) Sun JRE
sudo aptitude install sun-java6-jre
Its a nice software, although i haven't used it ;-). Installation is pretty easy, dowload the .deb file from sourceforget link here
downloaded the freemind_0.8.0-1_all.deb
sudo aptitude install freemind_0.8.0-1_all.deb
Everything happily works