I couldn't find the topic here.
mRemoteNG is a continuation of great app mRemote. It is open source and free and there is already a portable version of the software.
Basically this is a remote access client. It Can do Telnet, SSH, RDP, Citrix And HTML and VNC and all this in one window with tabs. Ive been using it for a while and it is a great admin tool. I wish i could see it as a part of portableapps.