GNOME alternatives / equivalent for Klipper?

You have:

Glipper - Klipper's Brother... for GTK. It has a limited amount of entries (MAX 99 Vs Klipper with 1024) but has nice features like sync different Glippers in the network, smart detection for similar clipboard copies and others. After a couple of versions ago, Glipper is GONE!. What you can do in Ubuntu 18.04+ is install the Gnome Extension Clipboard Indicator here https://extensions.gnome.org/extension/779/clipboard-indicator/

Parcellite - Small clipboard manager. Very nice and simple.

Synergy - You can share clipboard over Network (Including Mouse and Keyboard)

xfce4-clipman / xfce4-clipman-plugin - Klipper's Smaller Brother.. for xfce.

Install by:

sudo apt-get install glipper

sudo apt-get install parcellite

sudo apt-get install synergy

sudo apt-get install xfce4-clipman

Try Clipit

Install via Terminal:

sudo apt-get update && sudo apt-get install clipit

Diodon

Install by using the PPA via Terminal:

sudo apt-add-repository ppa:diodon-team/stable
sudo apt-get update
sudo apt-get install diodon diodon-plugins

I recommend Pastie.

Install it by -

sudo add-apt-repository ppa:hel-sheep/pastie

sudo apt-get update

sudo apt-get install pastie

CopyQ is a clipboard manager written in Qt that comes with some advanced features, image support, editable history, command line support, keyboard shortcuts and more.

CopyQ features:

• configurable history size, number of tray menu items, etc.;
• editable and searchable clipboard history;
• keyboard shortcuts for opening the clipboard history, show the tray menu and more;
• commands: you can define actions or commands when a text copied to the clipboard matches some criteria you set. This can be used for instance to open video player if text copied to the clipboard is an URL with multimedia content and so on;
• image support: when you copy a selection in GIMP, an image in Shutter (take a screenshot), etc., the image preview is displayed in the tray menu as well as in the clipboard history. This obviously doesn't work if you copy some image file (e.g.: in Nautilus) since that's treated like any other file;
• command line support: tabs, items, clipboard and configuration can be changed through command line interface;
• more.

Also, since the application is written in Qt, the tray icon/menu is automatically converted to an AppIndicator so you can use CopyQ in Unity without having to whitelist it to be able to use the notification area. If you don't get an AppIndicator for CopyQ, install the "sni-qt" package.

Ubuntu 13.04, 12.10 and 12.04 users can install CopyQ by using the following commands:

sudo add-apt-repository ppa:samrog131/ppa
sudo apt-get update
sudo apt-get install copyq

Since the above PPA has quite a few packages which might not be stable, I suggest you remove the PPA after installing CopyQ:

sudo add-apt-repository -r ppa:samrog131/ppa

Source: Webupd8.org - CopyQ: Interesting Clipboard Manager With Advanced Features

Try Parcellite

!

It's in the Ubuntu repo:

sudo apt-get install parcellite

Parcellite is a stripped down, basic-features-only clipboard manager with a small memory footprint for those who like simplicity.

Features:

• Keeps a clipboard history.
• Various view options to display items the way you like it.
• Daemon mode; guard your clipboard contents when you close applications.
• Perform custom commands using clipboard contents.

Parcellite now supports unity, and there's a ppa for the latest releases. There are two ppas - one that supports Unity and one that does not (for older distros or minimal systems). The Unity ppa is https://launchpad.net/~rickyrockrat/+archive/parcellite-appindicator

The NON-Unity ppa is https://launchpad.net/~rickyrockrat/+archive/parcellite

The latest code is: http://parcellite.sourceforge.net