When comparing SchemaCrawler vs pgModeler, the Slant community recommends SchemaCrawler for most people. In the question“What are the best relational database design and modelling tools?” SchemaCrawler is ranked 8th while pgModeler is ranked 10th. The most important reason people chose SchemaCrawler is:
The text-based output serves for database documentation, and is designed to be diff-ed against other database schemas.
Specs
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Pros

Pro Many options for output formats in addition to graphical
The text-based output serves for database documentation, and is designed to be diff-ed against other database schemas.

Pro Extensive and detailed documentation online
Including visuals of the results of command-line option usage.

Pro Free
Pro Diff scripts
Can generate scripts to synchronize a database.
Pro Reverse engineering
Can generate diagrams from an existing database.
Pro Export formats
Can export to SQL script file, PNG, SVG or directly to PostgreSQL.
Cons
Con Need Java

Con Does not work with schema dumpfiles
SchemaCrawler has no methods for dealing with when you only have a schema generated via something like (mysqldump --no-data [options] >schema-only_dump.sql) , and do not currently have access to a live database to connect with.
Con Compiling
Can't be compiled in Microsoft Visual Studio because of gcc/clang extensions.
Instructions on how to compile for Windows.
