The best replacement for airodump is kismet.

The best alternatives to airodump are rated as following:
★★★★★  kismet

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Speaking about airodump, one probably shouldn't forget about hidden ssid.

Other search terms related to airodump and their ratings are:
★★★★★ hidden ssid
★★★★ atheros ar9285
★ broadcom
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Google Trends

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airodump
kismet