Vector is a powerful open-source addon for Meteor Client providing some combat and many utility modules.
To install Vector correctly, place it in your mods folder along with Meteor Client.

Entity Fly          || Allows to fly with any living rideable entity
Entity Phase        || Allows you to phase with any entity
Fly                 || An improved version of the Meteor "Flight"
Hole Renderer       || Renders nearby safe-holes
Inventory Scroll    || Allows you to scroll in your hotbar while having screens opened
No Collision        || Removes selected block or world border collisions client-side
No World Border     || Disables certain aspects of the world border
No Fall Plus        || An improved version of the Meteor "No Fall"
No Swing            || Removes the hand-swinging animation client- and server-side
Packet Fly          || Fly with packets on most servers (inspired by Konas)
Packet Place        || Place blocks with packets to bypass desyncing with the server
Packet Hole Fill    || Fills nearby safe-holes with obsidian using packets
Ping Spoof          || Spoofs your ping without changing any gameplay
Placeholders        || Set custom placeholders to replace when sending messages
Portal God Mode     || Gives you invincibility when leaving a portal
Rubberband Fly      || A very customizable low-packet packet fly alternative
Smart Sprint        || Sprints when the player is able to, making the module "undetectable"
Skeleton ESP        || Renders a players skeleton
Surround Plus       || Surrounds you in inexplodable blocks to prevent much explosion damage
Tick Shift          || Allows you to move fast for limited time after standing still

.center      || Centers you on the block
.desync      || Desyncs the entity you're currently riding from the server
.teleport    || Allows you to teleport to any location
.trashcan    || Allows you to silently destroy any item in your hand without dropping it
.uuid        || Tells you a players uuid