There are numerous software available for Metagenomics ,each having a fair share of advantages and disadvantages. It is much better to use combination of tools rather than emphasizing upon a single tool. QIIME and Mothur are quite good for metagenomics and metatranscriptomics. For beginners its much better to start from SilvaNGS or MG-RAST. For extensive statistical analysis one can use METAGENAssist. Galaxy also provide many incorporated tools , and one can easily design his/her workflow.One can also use MetagenomeSeq (Bioconductor).
There are numerous software available for Metagenomics ,each having a fair share of advantages and disadvantages. It is much better to use combination of tools rather than emphasizing upon a single tool. QIIME and Mothur are quite good for metagenomics and metatranscriptomics. For beginners its much better to start from SilvaNGS or MG-RAST. For extensive statistical analysis one can use METAGENAssist. Galaxy also provide many incorporated tools , and one can easily design his/her workflow.One can also use MetagenomeSeq (Bioconductor).
MEGAN (now at version 6) has a great collection of tools for microbiome data. It is widely used. However, I don't have a complete comparison of MEGAN vs. other tools like QIIME mentioned earlier.