Complex sentence: Within weeks of the fork, ADempiere reached the top five of the SourceForge.net rankings, a clear indication of both the size of its developer community and its impact on the open source ERP software market.
Split into simpler sentences: Within weeks of the fork, ADempiere reached the top five of the SourceForge.net rankings. This activity provides a measure of both the size of its developer community and also its impact on the open source ERP software market.