The new leader of the DUP, Edwin Poots, has said history will be "kind" to Arlene Foster.
Speaking as Ms Foster announced her resignation as First Minister, Mr Poots told the Northern Ireland Assembly that she has had a "hugely successful" career.
"I believe history will be very kind to Arlene, it should be very kind to her because she has done a considerable course of work in ensuring that we move forward.
"Even after the difficult times of 2017 with the collapse of devolution, the commitment was there, and always there to ensure that we could get back together again, that we could take people forward again. And they could ensure that the public had this place to make decisions for them on their behalf."
New DUP leader Edwin Poots says 'I believe history will be very kind to Arlene, it should be kind to her' as Arlene Foster resigns as Northern Ireland first minister | https://t.co/zEmO7cx4zm pic.twitter.com/rPvkGyOw85— RTÉ News (@rtenews) June 14, 2021
Mr Poots described Ms Foster as a unionist and also a devolutionist.
"She, like I, was a child of the Troubles, and had a similar circumstance in that the Troubles visited our homes," he said.
"For Arlene I believe having peace in Northern Ireland and ensuring that we have peace and that we have a away of working with each other was a powerful part of what she done in her politics and what she sought to ensure in her politics, and in leading her to work with people who would have been regarded as enemies."
Taoiseach Micheál Martin thanked Ms Foster for her "contribution to public life over the years".
In a post on Twitter, he added: "I wish you and your family the very best and every happiness in the future."
Sinn Féin's Michelle O'Neill said power-sharing in Stormont cannot be built on "broken promises".
Speaking about restoring the Northern Ireland Assembly, she said: "We stood in this chamber and made our commitments to working together, that it was very much a day of hope, that we needed to deliver on power-sharing.
"It needs to be about tackling waiting lists and reforming our health service. You cannot build power-sharing on broken promises. You must deliver upon agreements that have been made. I'm committed to that, I hope others are committed to doing that.
"Arlene, every best wish for the future and I hope you get some special time with your family."
"Arlene, every best wish for the future and I hope you get some special time with your family." Northern Ireland Deputy First Minister Michelle O'Neill pays tribute to Arlene Foster | https://t.co/0M6Lf3Oi4P pic.twitter.com/95KrJeIF61— RTÉ News (@rtenews) June 14, 2021
Ms O'Neill said being in the public life is not an easy job, and it is even more challenging for a woman.
Sacrifices are made, she said, and they must deal with the additional burden of misogyny.
"If there is one thing we have done well together, it is highlight that on numerous occasions," she said.
Representing the SDLP, Infrastructure Minister Nichola Mallon told the Northern Ireland Assembly that Arlene Foster will have inspired many young girls to realise there should be "no limit on their ambitions".
She added: "Politics is never easy, and the last few weeks, I know, will not have been easy for the First Minister and her family.
"Leadership is never easy and leadership of our five-party Executive is not easy. It is incredibly challenging."
SDLP deputy leader Nichola Mallon pays tribute to Arlene Foster saying she and her family have made huge sacrifices, and the outgoing first minister 'has inspired many young girls to realise there should be no limit on their ambitions' https://t.co/zEmO7cx4zm pic.twitter.com/du07HpLuCm— RTÉ News (@rtenews) June 14, 2021
Archbishop John McDowell has commended Arlene Foster for her role as a senior politician and a member of the Church of Ireland.
In a statement, the Archbishop of Armagh and Primate of All Ireland admired Ms Foster's commitment to her vocation as a political figure and as a diligent member of her parish.
Revd McDowell said: "Nowhere is the vocation of a politician is one of immense complexity, nowhere more so that in a divided society like Northern Ireland".
He noted the sacrifice of such a position on leisure and family commitments.
"I trust and pray that Arlene will have more time to employ her many talents in other contexts, but still with the appetite for the service of others which she has shown throughout her career."