The freeware version of IDA v7.0 comes with the following limitations:

no commercial use is allowed

lacks all features introduced in IDA > v7.0

lacks support for many processors, file formats, etc…

comes without technical support

SHA1 checksums:

85b6db8d26be2560ed9b1ac4228fe2366a9e5453 idafree70_linux.run fc188886e174b2adc2d37c0df2858f0e192af7e1 idafree70_mac.zip 38b41baf3dd60dba67a7e656c5e5beb2d4a0adca idafree70_windows.exe