Man portable Anti-tank weapons
112mm (4.3kg warhead) APILAS single shot antitank weapon could potentially be used against a low/slow aircraft as could the 66mm LAW and different bodels of Soviet/Russian RPG. These are all fired with no guidance system and are as accurate as conditions allow largely depending on the experience and accuracy of the shooter.
TOW and other guided system ATW's are very bulky compared to say the Stinger or Soviet/Russian IGLA systems, however could be potentially be used agains aicraft even though not being designed to perform that task. To be effective an aircraft would have to be relatively large fly slow and low (Landing /Take-off) to make a good target for systems not designed to the air defense role.
JJ