diff --git a/src/psimpy/emulator/__init__.py b/src/psimpy/emulator/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..68b1f72ac75ebbd7bdbbb138177d34ac92fe66ac 100644
--- a/src/psimpy/emulator/__init__.py
+++ b/src/psimpy/emulator/__init__.py
@@ -0,0 +1 @@
+from psimpy.emulator.robustgasp import ScalarGaSP, PPGaSP
\ No newline at end of file
diff --git a/src/psimpy/inference/__init__.py b/src/psimpy/inference/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..99e74d7369cc9cbebbe53ce8c922061cde782763 100644
--- a/src/psimpy/inference/__init__.py
+++ b/src/psimpy/inference/__init__.py
@@ -0,0 +1,3 @@
+from psimpy.inference.active_learning import ActiveLearning
+from psimpy.inference.bayes_inference import GridEstimation
+from psimpy.inference.bayes_inference import MetropolisHastingsEstimation
\ No newline at end of file
diff --git a/src/psimpy/sampler/__init__.py b/src/psimpy/sampler/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..f3bf593d3e3afbf96bb5546f11ec89b111e50a2a 100644
--- a/src/psimpy/sampler/__init__.py
+++ b/src/psimpy/sampler/__init__.py
@@ -0,0 +1,3 @@
+from psimpy.sampler.latin import LHS
+from psimpy.sampler.saltelli import Saltelli
+from psimpy.sampler.metropolis_hastings import MetropolisHastings
\ No newline at end of file
diff --git a/src/psimpy/sensitivity/__init__.py b/src/psimpy/sensitivity/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..dd71058b8063dca546fb7d8075d3fe17155cd962 100644
--- a/src/psimpy/sensitivity/__init__.py
+++ b/src/psimpy/sensitivity/__init__.py
@@ -0,0 +1 @@
+from psimpy.sensitivity.sobol import SobolAnalyze
\ No newline at end of file
diff --git a/src/psimpy/simulator/__init__.py b/src/psimpy/simulator/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..75652d1cbde76dd875545a431733b67abf9dbc42 100644
--- a/src/psimpy/simulator/__init__.py
+++ b/src/psimpy/simulator/__init__.py
@@ -0,0 +1,3 @@
+from psimpy.simulator.mass_point_model import MassPointModel
+from psimpy.simulator.ravaflow24 import Ravaflow24Mixture
+from psimpy.simulator.run_simulator import RunSimulator
\ No newline at end of file
diff --git a/src/psimpy/utility/__init__.py b/src/psimpy/utility/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..e72a556b525bd306669e5ad091b7f8ea40350be4 100644
--- a/src/psimpy/utility/__init__.py
+++ b/src/psimpy/utility/__init__.py
@@ -0,0 +1 @@
+from psimpy.utility.util_funcs import check_bounds, scale_samples
\ No newline at end of file