i also know no free GOOD 3d program. but u can try milkshape 3D and/or 3DS MAX 30 days for free. and it costs only 20 euros. the only otherway is to dl it on some pear2 pear programms like kazaa. but its illegal and... i would do so. an other trick is to fake the date when u used the programm the first time. so u can use the 30 days demos howlong as u want. of maya theres a version called maya personal lerning edition. its nearly the same version like the original maya. but its free and u mustn´t sell ur modells.