Sequence Similarity Searching is a method of searching sequence databases by using alignment to a query sequence.
By statistically assessing how well database and query sequences match one can infer homology and transfer information to the query sequence.
NCBI BLAST
NCBI BLAST is the most commonly used sequence similarity search tool. It uses heuristics to perform fast local alignment searches.
PSISearch2D
PSISearch2D Query-seeded sequence iterative search with novel visualizations for domain & sequence alignments.
FASTA
FASTA is another commonly used sequence similarity search tool which uses heuristics for fast local alignment searching.
SBT-BLAST
SBT-BLAST is the used sequence similarity search tool. It uses heuristics to perform fast local alignment searches.