Algodoo

this is based on 3dmd or 3d molecular designs way of showing molecules

update 1.0: H O C N F was added

update 1.1:adding lone pairs

update 1.2 adding floor and double bond peices and fixing nitrogen peice

update 1.3 added floor cations and anions

update 1.4 removed friction on the floor and increased magnet power for lone pairs

update 1.5 IM BACK BABBBYY and also more nitrogen