The best replacement for interlink is dpd.

The best alternatives to interlink are rated as following:
★★★★★  dpd
★★★★  superlink
★★★  clearlink

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Speaking about interlink, one probably shouldn't forget about g3.

Other search terms related to interlink and their ratings are:
★★★★★ g3
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Google Trends

Scale is based on the average worldwide traffic of interlink in all years. Click on graph for more.
interlink
dpd
superlink