A Rake -T output sample.

rake.log

$ rake -T
	
rake about                  # List versions of all Rails frameworks and the environment
rake assets:clean           # Remove old compiled assets
rake assets:clobber         # Remove compiled assets
rake assets:environment     # Load asset compile environment
rake assets:precompile      # Compile all the assets named in config.assets.precompile
rake db:create              # Create the database from DATABASE_URL or config/database.yml for the current Rails.env (use db:create:all to create all dbs in the config)
rake db:drop                # Drops the database using DATABASE_URL or the current Rails.env (use db:drop:all to drop all databases)
rake db:fixtures:load       # Load fixtures into the current environment's database
rake db:migrate             # Migrate the database (options: VERSION=x, VERBOSE=false, SCOPE=blog)
rake db:migrate:status      # Display status of migrations
rake db:rollback            # Rolls the schema back to the previous version (specify steps w/ STEP=n)
rake db:schema:cache:clear  # Clear a db/schema_cache.dump file
rake db:schema:cache:dump   # Create a db/schema_cache.dump file
rake db:schema:dump         # Create a db/schema.rb file that can be portably used against any DB supported by AR
rake db:schema:load         # Load a schema.rb file into the database
rake db:seed                # Load the seed data from db/seeds.rb
rake db:setup               # Create the database, load the schema, and initialize with the seed data (use db:reset to also drop the db first)
rake db:structure:dump      # Dump the database structure to db/structure.sql
rake db:version             # Retrieves the current schema version number
rake doc:app                # Generate docs for the app -- also available doc:rails, doc:guides (options: TEMPLATE=/rdoc-template.rb, TITLE="Custom Title")
rake log:clear              # Truncates all *.log files in log/ to zero bytes (specify which logs with LOGS=test,development)
rake middleware             # Prints out your Rack middleware stack
rake notes                  # Enumerate all annotations (use notes:optimize, :fixme, :todo for focus)
rake notes:custom           # Enumerate a custom annotation, specify with ANNOTATION=CUSTOM
rake rails:template         # Applies the template supplied by LOCATION=(/path/to/template) or URL
rake rails:update           # Update configs and some other initially generated files (or use just update:configs, update:bin, or update:application_controller)
rake routes                 # Print out all defined routes in match order, with names
rake secret                 # Generate a cryptographically secure secret key (this is typically used to generate a secret for cookie sessions)
rake stats                  # Report code statistics (KLOCs, etc) from the application
rake test                   # Runs test:units, test:functionals, test:integration together
rake test:all               # Run tests quickly by merging all types and not resetting db
rake test:all:db            # Run tests quickly, but also reset db
rake test:recent            # Run tests for {:recent=>["test:deprecated", "test:prepare"]} / Deprecated; Test recent changes
rake test:uncommitted       # Run tests for {:uncommitted=>["test:deprecated", "test:prepare"]} / Deprecated; Test changes since last checkin (only Subversion and Git)
rake time:zones:all         # Displays all time zones, also available: time:zones:us, time:zones:local -- filter with OFFSET parameter, e.g., OFFSET=-6
rake tmp:clear              # Clear session, cache, and socket files from tmp/ (narrow w/ tmp:sessions:clear, tmp:cache:clear, tmp:sockets:clear)
rake tmp:create             # Creates tmp directories for sessions, cache, sockets, and pids