fastq-count-bases: counts total number of bases (nts) in FASTQ file.
fastq-filter-size: filters entries in FASTQ file by sequence length.
fastq-grep: finds entries in FASTQ file whose sequence contain a pattern.
fastq-guess-quality: guesses the used quality encoding in FASTQ file.
fastq-sanitize-header: splits/replaces whitespace in headers of FASTQ file.
fastq-trim: trims sequences/qualities in a FASTQ file.